Commit a290f51

Browse files
jasnelladuh95
jasnell
authored and
aduh95
committed
benchmark: add benchmarks for experimental stream/iter
Signed-off-by: James M Snell <jasnell@gmail.com> Assisted-By: Claude/Opus 4.6 PR-URL: #62066 Backport-PR-URL: #64675 Reviewed-By: Robert Nagy <ronagy@icloud.com> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
1 parent 14c5473 commit a290f51

9 files changed

Lines changed: 1158 additions & 0 deletions

‎benchmark/fs/bench-filehandle-pipetosync.js‎

Lines changed: 103 additions & 0 deletions
Original file line numberDiff line numberDiff line change
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1+
// Benchmark: pipeToSync with sync compression transforms.
2+
// Measures fully synchronous file-to-file pipeline (no threadpool, no promises).
3+
'use strict';
4+
5+
constcommon=require('../common.js');
6+
constfs=require('fs');
7+
const{ openSync, closeSync, writeSync, unlinkSync }=fs;
8+
9+
consttmpdir=require('../../test/common/tmpdir');
10+
tmpdir.refresh();
11+
constsrcFile=tmpdir.resolve(`.removeme-sync-bench-src-${process.pid}`);
12+
constdstFile=tmpdir.resolve(`.removeme-sync-bench-dst-${process.pid}`);
13+
14+
constbench=common.createBenchmark(main,{
15+
compression: ['gzip','deflate','brotli','zstd'],
16+
filesize: [1024*1024,16*1024*1024,64*1024*1024],
17+
n: [5],
18+
},{
19+
flags: ['--experimental-stream-iter'],
20+
});
21+
22+
functionmain({ compression, filesize, n }){
23+
// Create the fixture file with repeating lowercase ASCII
24+
constchunk=Buffer.alloc(Math.min(filesize,64*1024),'abcdefghij');
25+
constfd=openSync(srcFile,'w');
26+
letremaining=filesize;
27+
while(remaining>0){
28+
consttoWrite=Math.min(remaining,chunk.length);
29+
writeSync(fd,chunk,0,toWrite);
30+
remaining-=toWrite;
31+
}
32+
closeSync(fd);
33+
34+
const{ pipeToSync }=require('stream/iter');
35+
const{
36+
compressGzipSync,
37+
compressDeflateSync,
38+
compressBrotliSync,
39+
compressZstdSync,
40+
}=require('zlib/iter');
41+
const{ open }=fs.promises;
42+
43+
constcompressFactory={
44+
gzip: compressGzipSync,
45+
deflate: compressDeflateSync,
46+
brotli: compressBrotliSync,
47+
zstd: compressZstdSync,
48+
}[compression];
49+
50+
// Stateless uppercase transform (sync)
51+
constupper=(chunks)=>{
52+
if(chunks===null)returnnull;
53+
constout=newArray(chunks.length);
54+
for(letj=0;j<chunks.length;j++){
55+
constsrc=chunks[j];
56+
constbuf=Buffer.allocUnsafe(src.length);
57+
for(leti=0;i<src.length;i++){
58+
constb=src[i];
59+
buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
60+
}
61+
out[j]=buf;
62+
}
63+
returnout;
64+
};
65+
66+
// Use a synchronous wrapper since pipeToSync is fully sync.
67+
// We need FileHandle for pullSync/writer, so open async then run sync.
68+
(async()=>{
69+
constsrcFh=awaitopen(srcFile,'r');
70+
constdstFh=awaitopen(dstFile,'w');
71+
72+
// Warm up
73+
runSync(srcFh,dstFh,upper,compressFactory,pipeToSync);
74+
75+
// Reset file positions for the benchmark
76+
awaitsrcFh.close();
77+
awaitdstFh.close();
78+
79+
bench.start();
80+
lettotalBytes=0;
81+
for(leti=0;i<n;i++){
82+
constsrc=awaitopen(srcFile,'r');
83+
constdst=awaitopen(dstFile,'w');
84+
totalBytes+=runSync(src,dst,upper,compressFactory,pipeToSync);
85+
awaitsrc.close();
86+
awaitdst.close();
87+
}
88+
bench.end(totalBytes/(1024*1024));
89+
90+
cleanup();
91+
})();
92+
}
93+
94+
functionrunSync(srcFh,dstFh,upper,compressFactory,pipeToSync){
95+
constw=dstFh.writer();
96+
pipeToSync(srcFh.pullSync(upper,compressFactory()),w);
97+
returnw.endSync();
98+
}
99+
100+
functioncleanup(){
101+
try{unlinkSync(srcFile);}catch{/* Ignore */}
102+
try{unlinkSync(dstFile);}catch{/* Ignore */}
103+
}

‎benchmark/fs/bench-filehandle-pull-vs-webstream.js‎

Lines changed: 201 additions & 0 deletions
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1+
// Compare FileHandle.createReadStream() vs readableWebStream() vs pull()
2+
// reading a large file through two transforms: uppercase then compress.
3+
'use strict';
4+
5+
constcommon=require('../common.js');
6+
constfs=require('fs');
7+
constzlib=require('zlib');
8+
const{ Transform, Writable, pipeline }=require('stream');
9+
10+
consttmpdir=require('../../test/common/tmpdir');
11+
tmpdir.refresh();
12+
constfilename=tmpdir.resolve(`.removeme-benchmark-garbage-${process.pid}`);
13+
14+
constbench=common.createBenchmark(main,{
15+
api: ['classic','webstream','pull'],
16+
compression: ['gzip','deflate','brotli','zstd'],
17+
filesize: [1024*1024,16*1024*1024,64*1024*1024],
18+
n: [5],
19+
},{
20+
flags: ['--experimental-stream-iter'],
21+
// Classic and webstream only support gzip (native zlib / CompressionStream).
22+
// Brotli, deflate, zstd are pull-only via stream/iter transforms.
23+
combinationFilter({ api, compression }){
24+
if(api==='classic'&&compression!=='gzip')returnfalse;
25+
if(api==='webstream'&&compression!=='gzip')returnfalse;
26+
returntrue;
27+
},
28+
});
29+
30+
functionmain({ api, compression, filesize, n }){
31+
// Create the fixture file with repeating lowercase ASCII
32+
constchunk=Buffer.alloc(Math.min(filesize,64*1024),'abcdefghij');
33+
constfd=fs.openSync(filename,'w');
34+
letremaining=filesize;
35+
while(remaining>0){
36+
consttoWrite=Math.min(remaining,chunk.length);
37+
fs.writeSync(fd,chunk,0,toWrite);
38+
remaining-=toWrite;
39+
}
40+
fs.closeSync(fd);
41+
42+
if(api==='classic'){
43+
benchClassic(n,filesize).then(()=>cleanup());
44+
}elseif(api==='webstream'){
45+
benchWebStream(n,filesize).then(()=>cleanup());
46+
}else{
47+
benchPull(n,filesize,compression).then(()=>cleanup());
48+
}
49+
}
50+
51+
functioncleanup(){
52+
try{fs.unlinkSync(filename);}catch{/* ignore */}
53+
}
54+
55+
// Stateless uppercase transform (shared by all paths)
56+
functionuppercaseChunk(chunk){
57+
constbuf=Buffer.allocUnsafe(chunk.length);
58+
for(leti=0;i<chunk.length;i++){
59+
constb=chunk[i];
60+
buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
61+
}
62+
returnbuf;
63+
}
64+
65+
// ---------------------------------------------------------------------------
66+
// Classic streams path: createReadStream -> Transform (upper) -> createGzip
67+
// ---------------------------------------------------------------------------
68+
asyncfunctionbenchClassic(n,filesize){
69+
awaitrunClassic();
70+
71+
bench.start();
72+
lettotalBytes=0;
73+
for(leti=0;i<n;i++){
74+
totalBytes+=awaitrunClassic();
75+
}
76+
bench.end(totalBytes/(1024*1024));
77+
}
78+
79+
functionrunClassic(){
80+
returnnewPromise((resolve,reject)=>{
81+
constrs=fs.createReadStream(filename);
82+
83+
constupper=newTransform({
84+
transform(chunk,encoding,callback){
85+
callback(null,uppercaseChunk(chunk));
86+
},
87+
});
88+
89+
constgz=zlib.createGzip();
90+
91+
lettotalBytes=0;
92+
constsink=newWritable({
93+
write(chunk,encoding,callback){
94+
totalBytes+=chunk.length;
95+
callback();
96+
},
97+
});
98+
99+
pipeline(rs,upper,gz,sink,(err)=>{
100+
if(err)reject(err);
101+
elseresolve(totalBytes);
102+
});
103+
});
104+
}
105+
106+
// ---------------------------------------------------------------------------
107+
// WebStream path: readableWebStream -> TransformStream (upper) -> CompressionStream
108+
// ---------------------------------------------------------------------------
109+
asyncfunctionbenchWebStream(n,filesize){
110+
awaitrunWebStream();
111+
112+
bench.start();
113+
lettotalBytes=0;
114+
for(leti=0;i<n;i++){
115+
totalBytes+=awaitrunWebStream();
116+
}
117+
bench.end(totalBytes/(1024*1024));
118+
}
119+
120+
asyncfunctionrunWebStream(){
121+
constfh=awaitfs.promises.open(filename,'r');
122+
try{
123+
constrs=fh.readableWebStream();
124+
125+
constupper=newTransformStream({
126+
transform(chunk,controller){
127+
constbuf=newUint8Array(chunk.length);
128+
for(leti=0;i<chunk.length;i++){
129+
constb=chunk[i];
130+
buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
131+
}
132+
controller.enqueue(buf);
133+
},
134+
});
135+
136+
constcompress=newCompressionStream('gzip');
137+
constoutput=rs.pipeThrough(upper).pipeThrough(compress);
138+
constreader=output.getReader();
139+
140+
lettotalBytes=0;
141+
while(true){
142+
const{ done, value }=awaitreader.read();
143+
if(done)break;
144+
totalBytes+=value.byteLength;
145+
}
146+
returntotalBytes;
147+
}finally{
148+
awaitfh.close();
149+
}
150+
}
151+
152+
// ---------------------------------------------------------------------------
153+
// Pull/iter path: pull() with uppercase transform + selected compression
154+
// ---------------------------------------------------------------------------
155+
asyncfunctionbenchPull(n,filesize,compression){
156+
constiter=require('zlib/iter');
157+
158+
constcompressFactory={
159+
gzip: iter.compressGzip,
160+
deflate: iter.compressDeflate,
161+
brotli: iter.compressBrotli,
162+
zstd: iter.compressZstd,
163+
}[compression];
164+
165+
// Warm up
166+
awaitrunPull(compressFactory);
167+
168+
bench.start();
169+
lettotalBytes=0;
170+
for(leti=0;i<n;i++){
171+
totalBytes+=awaitrunPull(compressFactory);
172+
}
173+
bench.end(totalBytes/(1024*1024));
174+
}
175+
176+
asyncfunctionrunPull(compressFactory){
177+
constfh=awaitfs.promises.open(filename,'r');
178+
try{
179+
// Stateless transform: uppercase each chunk in the batch
180+
constupper=(chunks)=>{
181+
if(chunks===null)returnnull;
182+
constout=newArray(chunks.length);
183+
for(letj=0;j<chunks.length;j++){
184+
out[j]=uppercaseChunk(chunks[j]);
185+
}
186+
returnout;
187+
};
188+
189+
constreadable=fh.pull(upper,compressFactory());
190+
191+
lettotalBytes=0;
192+
forawait(constchunksofreadable){
193+
for(leti=0;i<chunks.length;i++){
194+
totalBytes+=chunks[i].byteLength;
195+
}
196+
}
197+
returntotalBytes;
198+
}finally{
199+
awaitfh.close();
200+
}
201+
}

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Skip to content
Commit a290f51
Browse files
jasnelladuh95
jasnell
authored and
aduh95
committed
benchmark: add benchmarks for experimental stream/iter
Signed-off-by: James M Snell <jasnell@gmail.com>
Assisted-By: Claude/Opus 4.6
PR-URL: #62066
Backport-PR-URL: #64675
Reviewed-By: Robert Nagy <ronagy@icloud.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
1 parent 14c5473 commit a290f51
9 files changed
Lines changed: 1158 additions & 0 deletions
‎benchmark/fs/bench-filehandle-pipetosync.js‎
Lines changed: 103 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,103 @@
1+
// Benchmark: pipeToSync with sync compression transforms.
2+
// Measures fully synchronous file-to-file pipeline (no threadpool, no promises).
3+
'use strict';
4+
5+
constcommon=require('../common.js');
6+
constfs=require('fs');
7+
const{ openSync, closeSync, writeSync, unlinkSync }=fs;
8+
9+
consttmpdir=require('../../test/common/tmpdir');
10+
tmpdir.refresh();
11+
constsrcFile=tmpdir.resolve(`.removeme-sync-bench-src-${process.pid}`);
12+
constdstFile=tmpdir.resolve(`.removeme-sync-bench-dst-${process.pid}`);
13+
14+
constbench=common.createBenchmark(main,{
15+
compression: ['gzip','deflate','brotli','zstd'],
16+
filesize: [1024*1024,16*1024*1024,64*1024*1024],
17+
n: [5],
18+
},{
19+
flags: ['--experimental-stream-iter'],
20+
});
21+
22+
functionmain({ compression, filesize, n }){
23+
// Create the fixture file with repeating lowercase ASCII
24+
constchunk=Buffer.alloc(Math.min(filesize,64*1024),'abcdefghij');
25+
constfd=openSync(srcFile,'w');
26+
letremaining=filesize;
27+
while(remaining>0){
28+
consttoWrite=Math.min(remaining,chunk.length);
29+
writeSync(fd,chunk,0,toWrite);
30+
remaining-=toWrite;
31+
}
32+
closeSync(fd);
33+
34+
const{ pipeToSync }=require('stream/iter');
35+
const{
36+
 compressGzipSync,
37+
 compressDeflateSync,
38+
 compressBrotliSync,
39+
 compressZstdSync,
40+
}=require('zlib/iter');
41+
const{ open }=fs.promises;
42+
43+
constcompressFactory={
44+
gzip: compressGzipSync,
45+
deflate: compressDeflateSync,
46+
brotli: compressBrotliSync,
47+
zstd: compressZstdSync,
48+
}[compression];
49+
50+
// Stateless uppercase transform (sync)
51+
constupper=(chunks)=>{
52+
if(chunks===null)returnnull;
53+
constout=newArray(chunks.length);
54+
for(letj=0;j<chunks.length;j++){
55+
constsrc=chunks[j];
56+
constbuf=Buffer.allocUnsafe(src.length);
57+
for(leti=0;i<src.length;i++){
58+
constb=src[i];
59+
buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
60+
}
61+
out[j]=buf;
62+
}
63+
returnout;
64+
};
65+
66+
// Use a synchronous wrapper since pipeToSync is fully sync.
67+
// We need FileHandle for pullSync/writer, so open async then run sync.
68+
(async()=>{
69+
constsrcFh=awaitopen(srcFile,'r');
70+
constdstFh=awaitopen(dstFile,'w');
71+
72+
// Warm up
73+
runSync(srcFh,dstFh,upper,compressFactory,pipeToSync);
74+
75+
// Reset file positions for the benchmark
76+
awaitsrcFh.close();
77+
awaitdstFh.close();
78+
79+
bench.start();
80+
lettotalBytes=0;
81+
for(leti=0;i<n;i++){
82+
constsrc=awaitopen(srcFile,'r');
83+
constdst=awaitopen(dstFile,'w');
84+
totalBytes+=runSync(src,dst,upper,compressFactory,pipeToSync);
85+
awaitsrc.close();
86+
awaitdst.close();
87+
}
88+
bench.end(totalBytes/(1024*1024));
89+
90+
cleanup();
91+
})();
92+
}
93+
94+
functionrunSync(srcFh,dstFh,upper,compressFactory,pipeToSync){
95+
constw=dstFh.writer();
96+
pipeToSync(srcFh.pullSync(upper,compressFactory()),w);
97+
returnw.endSync();
98+
}
99+
100+
functioncleanup(){
101+
try{unlinkSync(srcFile);}catch{/* Ignore */}
102+
try{unlinkSync(dstFile);}catch{/* Ignore */}
103+
}
‎benchmark/fs/bench-filehandle-pull-vs-webstream.js‎
Lines changed: 201 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,201 @@
1+
// Compare FileHandle.createReadStream() vs readableWebStream() vs pull()
2+
// reading a large file through two transforms: uppercase then compress.
3+
'use strict';
4+
5+
constcommon=require('../common.js');
6+
constfs=require('fs');
7+
constzlib=require('zlib');
8+
const{ Transform, Writable, pipeline }=require('stream');
9+
10+
consttmpdir=require('../../test/common/tmpdir');
11+
tmpdir.refresh();
12+
constfilename=tmpdir.resolve(`.removeme-benchmark-garbage-${process.pid}`);
13+
14+
constbench=common.createBenchmark(main,{
15+
api: ['classic','webstream','pull'],
16+
compression: ['gzip','deflate','brotli','zstd'],
17+
filesize: [1024*1024,16*1024*1024,64*1024*1024],
18+
n: [5],
19+
},{
20+
flags: ['--experimental-stream-iter'],
21+
// Classic and webstream only support gzip (native zlib / CompressionStream).
22+
// Brotli, deflate, zstd are pull-only via stream/iter transforms.
23+
combinationFilter({ api, compression }){
24+
if(api==='classic'&&compression!=='gzip')returnfalse;
25+
if(api==='webstream'&&compression!=='gzip')returnfalse;
26+
returntrue;
27+
},
28+
});
29+
30+
functionmain({ api, compression, filesize, n }){
31+
// Create the fixture file with repeating lowercase ASCII
32+
constchunk=Buffer.alloc(Math.min(filesize,64*1024),'abcdefghij');
33+
constfd=fs.openSync(filename,'w');
34+
letremaining=filesize;
35+
while(remaining>0){
36+
consttoWrite=Math.min(remaining,chunk.length);
37+
fs.writeSync(fd,chunk,0,toWrite);
38+
remaining-=toWrite;
39+
}
40+
fs.closeSync(fd);
41+
42+
if(api==='classic'){
43+
benchClassic(n,filesize).then(()=>cleanup());
44+
}elseif(api==='webstream'){
45+
benchWebStream(n,filesize).then(()=>cleanup());
46+
}else{
47+
benchPull(n,filesize,compression).then(()=>cleanup());
48+
}
49+
}
50+
51+
functioncleanup(){
52+
try{fs.unlinkSync(filename);}catch{/* ignore */}
53+
}
54+
55+
// Stateless uppercase transform (shared by all paths)
56+
functionuppercaseChunk(chunk){
57+
constbuf=Buffer.allocUnsafe(chunk.length);
58+
for(leti=0;i<chunk.length;i++){
59+
constb=chunk[i];
60+
buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
61+
}
62+
returnbuf;
63+
}
64+
65+
// ---------------------------------------------------------------------------
66+
// Classic streams path: createReadStream -> Transform (upper) -> createGzip
67+
// ---------------------------------------------------------------------------
68+
asyncfunctionbenchClassic(n,filesize){
69+
awaitrunClassic();
70+
71+
bench.start();
72+
lettotalBytes=0;
73+
for(leti=0;i<n;i++){
74+
totalBytes+=awaitrunClassic();
75+
}
76+
bench.end(totalBytes/(1024*1024));
77+
}
78+
79+
functionrunClassic(){
80+
returnnewPromise((resolve,reject)=>{
81+
constrs=fs.createReadStream(filename);
82+
83+
constupper=newTransform({
84+
transform(chunk,encoding,callback){
85+
callback(null,uppercaseChunk(chunk));
86+
},
87+
});
88+
89+
constgz=zlib.createGzip();
90+
91+
lettotalBytes=0;
92+
constsink=newWritable({
93+
write(chunk,encoding,callback){
94+
totalBytes+=chunk.length;
95+
callback();
96+
},
97+
});
98+
99+
pipeline(rs,upper,gz,sink,(err)=>{
100+
if(err)reject(err);
101+
elseresolve(totalBytes);
102+
});
103+
});
104+
}
105+
106+
// ---------------------------------------------------------------------------
107+
// WebStream path: readableWebStream -> TransformStream (upper) -> CompressionStream
108+
// ---------------------------------------------------------------------------
109+
asyncfunctionbenchWebStream(n,filesize){
110+
awaitrunWebStream();
111+
112+
bench.start();
113+
lettotalBytes=0;
114+
for(leti=0;i<n;i++){
115+
totalBytes+=awaitrunWebStream();
116+
}
117+
bench.end(totalBytes/(1024*1024));
118+
}
119+
120+
asyncfunctionrunWebStream(){
121+
constfh=awaitfs.promises.open(filename,'r');
122+
try{
123+
constrs=fh.readableWebStream();
124+
125+
constupper=newTransformStream({
126+
transform(chunk,controller){
127+
constbuf=newUint8Array(chunk.length);
128+
for(leti=0;i<chunk.length;i++){
129+
constb=chunk[i];
130+
buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
131+
}
132+
controller.enqueue(buf);
133+
},
134+
});
135+
136+
constcompress=newCompressionStream('gzip');
137+
constoutput=rs.pipeThrough(upper).pipeThrough(compress);
138+
constreader=output.getReader();
139+
140+
lettotalBytes=0;
141+
while(true){
142+
const{ done, value }=awaitreader.read();
143+
if(done)break;
144+
totalBytes+=value.byteLength;
145+
}
146+
returntotalBytes;
147+
}finally{
148+
awaitfh.close();
149+
}
150+
}
151+
152+
// ---------------------------------------------------------------------------
153+
// Pull/iter path: pull() with uppercase transform + selected compression
154+
// ---------------------------------------------------------------------------
155+
asyncfunctionbenchPull(n,filesize,compression){
156+
constiter=require('zlib/iter');
157+
158+
constcompressFactory={
159+
gzip: iter.compressGzip,
160+
deflate: iter.compressDeflate,
161+
brotli: iter.compressBrotli,
162+
zstd: iter.compressZstd,
163+
}[compression];
164+
165+
// Warm up
166+
awaitrunPull(compressFactory);
167+
168+
bench.start();
169+
lettotalBytes=0;
170+
for(leti=0;i<n;i++){
171+
totalBytes+=awaitrunPull(compressFactory);
172+
}
173+
bench.end(totalBytes/(1024*1024));
174+
}
175+
176+
asyncfunctionrunPull(compressFactory){
177+
constfh=awaitfs.promises.open(filename,'r');
178+
try{
179+
// Stateless transform: uppercase each chunk in the batch
180+
constupper=(chunks)=>{
181+
if(chunks===null)returnnull;
182+
constout=newArray(chunks.length);
183+
for(letj=0;j<chunks.length;j++){
184+
out[j]=uppercaseChunk(chunks[j]);
185+
}
186+
returnout;
187+
};
188+
189+
constreadable=fh.pull(upper,compressFactory());
190+
191+
lettotalBytes=0;
192+
forawait(constchunksofreadable){
193+
for(leti=0;i<chunks.length;i++){
194+
totalBytes+=chunks[i].byteLength;
195+
}
196+
}
197+
returntotalBytes;
198+
}finally{
199+
awaitfh.close();
200+
}
201+
}
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Comments
 (0)

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Commit a290f51
Browse files
jasnelladuh95
jasnell
authored and
aduh95
committed
benchmark: add benchmarks for experimental stream/iter
Signed-off-by: James M Snell <jasnell@gmail.com>
Assisted-By: Claude/Opus 4.6
PR-URL: #62066
Backport-PR-URL: #64675
Reviewed-By: Robert Nagy <ronagy@icloud.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
1 parent 14c5473 commit a290f51
9 files changed
Lines changed: 1158 additions & 0 deletions
‎benchmark/fs/bench-filehandle-pipetosync.js‎
Lines changed: 103 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,103 @@
1+
// Benchmark: pipeToSync with sync compression transforms.
2+
// Measures fully synchronous file-to-file pipeline (no threadpool, no promises).
3+
'use strict';
4+
5+
constcommon=require('../common.js');
6+
constfs=require('fs');
7+
const{ openSync, closeSync, writeSync, unlinkSync }=fs;
8+
9+
consttmpdir=require('../../test/common/tmpdir');
10+
tmpdir.refresh();
11+
constsrcFile=tmpdir.resolve(`.removeme-sync-bench-src-${process.pid}`);
12+
constdstFile=tmpdir.resolve(`.removeme-sync-bench-dst-${process.pid}`);
13+
14+
constbench=common.createBenchmark(main,{
15+
compression: ['gzip','deflate','brotli','zstd'],
16+
filesize: [1024*1024,16*1024*1024,64*1024*1024],
17+
n: [5],
18+
},{
19+
flags: ['--experimental-stream-iter'],
20+
});
21+
22+
functionmain({ compression, filesize, n }){
23+
// Create the fixture file with repeating lowercase ASCII
24+
constchunk=Buffer.alloc(Math.min(filesize,64*1024),'abcdefghij');
25+
constfd=openSync(srcFile,'w');
26+
letremaining=filesize;
27+
while(remaining>0){
28+
consttoWrite=Math.min(remaining,chunk.length);
29+
writeSync(fd,chunk,0,toWrite);
30+
remaining-=toWrite;
31+
}
32+
closeSync(fd);
33+
34+
const{ pipeToSync }=require('stream/iter');
35+
const{
36+
 compressGzipSync,
37+
 compressDeflateSync,
38+
 compressBrotliSync,
39+
 compressZstdSync,
40+
}=require('zlib/iter');
41+
const{ open }=fs.promises;
42+
43+
constcompressFactory={
44+
gzip: compressGzipSync,
45+
deflate: compressDeflateSync,
46+
brotli: compressBrotliSync,
47+
zstd: compressZstdSync,
48+
}[compression];
49+
50+
// Stateless uppercase transform (sync)
51+
constupper=(chunks)=>{
52+
if(chunks===null)returnnull;
53+
constout=newArray(chunks.length);
54+
for(letj=0;j<chunks.length;j++){
55+
constsrc=chunks[j];
56+
constbuf=Buffer.allocUnsafe(src.length);
57+
for(leti=0;i<src.length;i++){
58+
constb=src[i];
59+
buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
60+
}
61+
out[j]=buf;
62+
}
63+
returnout;
64+
};
65+
66+
// Use a synchronous wrapper since pipeToSync is fully sync.
67+
// We need FileHandle for pullSync/writer, so open async then run sync.
68+
(async()=>{
69+
constsrcFh=awaitopen(srcFile,'r');
70+
constdstFh=awaitopen(dstFile,'w');
71+
72+
// Warm up
73+
runSync(srcFh,dstFh,upper,compressFactory,pipeToSync);
74+
75+
// Reset file positions for the benchmark
76+
awaitsrcFh.close();
77+
awaitdstFh.close();
78+
79+
bench.start();
80+
lettotalBytes=0;
81+
for(leti=0;i<n;i++){
82+
constsrc=awaitopen(srcFile,'r');
83+
constdst=awaitopen(dstFile,'w');
84+
totalBytes+=runSync(src,dst,upper,compressFactory,pipeToSync);
85+
awaitsrc.close();
86+
awaitdst.close();
87+
}
88+
bench.end(totalBytes/(1024*1024));
89+
90+
cleanup();
91+
})();
92+
}
93+
94+
functionrunSync(srcFh,dstFh,upper,compressFactory,pipeToSync){
95+
constw=dstFh.writer();
96+
pipeToSync(srcFh.pullSync(upper,compressFactory()),w);
97+
returnw.endSync();
98+
}
99+
100+
functioncleanup(){
101+
try{unlinkSync(srcFile);}catch{/* Ignore */}
102+
try{unlinkSync(dstFile);}catch{/* Ignore */}
103+
}
‎benchmark/fs/bench-filehandle-pull-vs-webstream.js‎
Lines changed: 201 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,201 @@
1+
// Compare FileHandle.createReadStream() vs readableWebStream() vs pull()
2+
// reading a large file through two transforms: uppercase then compress.
3+
'use strict';
4+
5+
constcommon=require('../common.js');
6+
constfs=require('fs');
7+
constzlib=require('zlib');
8+
const{ Transform, Writable, pipeline }=require('stream');
9+
10+
consttmpdir=require('../../test/common/tmpdir');
11+
tmpdir.refresh();
12+
constfilename=tmpdir.resolve(`.removeme-benchmark-garbage-${process.pid}`);
13+
14+
constbench=common.createBenchmark(main,{
15+
api: ['classic','webstream','pull'],
16+
compression: ['gzip','deflate','brotli','zstd'],
17+
filesize: [1024*1024,16*1024*1024,64*1024*1024],
18+
n: [5],
19+
},{
20+
flags: ['--experimental-stream-iter'],
21+
// Classic and webstream only support gzip (native zlib / CompressionStream).
22+
// Brotli, deflate, zstd are pull-only via stream/iter transforms.
23+
combinationFilter({ api, compression }){
24+
if(api==='classic'&&compression!=='gzip')returnfalse;
25+
if(api==='webstream'&&compression!=='gzip')returnfalse;
26+
returntrue;
27+
},
28+
});
29+
30+
functionmain({ api, compression, filesize, n }){
31+
// Create the fixture file with repeating lowercase ASCII
32+
constchunk=Buffer.alloc(Math.min(filesize,64*1024),'abcdefghij');
33+
constfd=fs.openSync(filename,'w');
34+
letremaining=filesize;
35+
while(remaining>0){
36+
consttoWrite=Math.min(remaining,chunk.length);
37+
fs.writeSync(fd,chunk,0,toWrite);
38+
remaining-=toWrite;
39+
}
40+
fs.closeSync(fd);
41+
42+
if(api==='classic'){
43+
benchClassic(n,filesize).then(()=>cleanup());
44+
}elseif(api==='webstream'){
45+
benchWebStream(n,filesize).then(()=>cleanup());
46+
}else{
47+
benchPull(n,filesize,compression).then(()=>cleanup());
48+
}
49+
}
50+
51+
functioncleanup(){
52+
try{fs.unlinkSync(filename);}catch{/* ignore */}
53+
}
54+
55+
// Stateless uppercase transform (shared by all paths)
56+
functionuppercaseChunk(chunk){
57+
constbuf=Buffer.allocUnsafe(chunk.length);
58+
for(leti=0;i<chunk.length;i++){
59+
constb=chunk[i];
60+
buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
61+
}
62+
returnbuf;
63+
}
64+
65+
// ---------------------------------------------------------------------------
66+
// Classic streams path: createReadStream -> Transform (upper) -> createGzip
67+
// ---------------------------------------------------------------------------
68+
asyncfunctionbenchClassic(n,filesize){
69+
awaitrunClassic();
70+
71+
bench.start();
72+
lettotalBytes=0;
73+
for(leti=0;i<n;i++){
74+
totalBytes+=awaitrunClassic();
75+
}
76+
bench.end(totalBytes/(1024*1024));
77+
}
78+
79+
functionrunClassic(){
80+
returnnewPromise((resolve,reject)=>{
81+
constrs=fs.createReadStream(filename);
82+
83+
constupper=newTransform({
84+
transform(chunk,encoding,callback){
85+
callback(null,uppercaseChunk(chunk));
86+
},
87+
});
88+
89+
constgz=zlib.createGzip();
90+
91+
lettotalBytes=0;
92+
constsink=newWritable({
93+
write(chunk,encoding,callback){
94+
totalBytes+=chunk.length;
95+
callback();
96+
},
97+
});
98+
99+
pipeline(rs,upper,gz,sink,(err)=>{
100+
if(err)reject(err);
101+
elseresolve(totalBytes);
102+
});
103+
});
104+
}
105+
106+
// ---------------------------------------------------------------------------
107+
// WebStream path: readableWebStream -> TransformStream (upper) -> CompressionStream
108+
// ---------------------------------------------------------------------------
109+
asyncfunctionbenchWebStream(n,filesize){
110+
awaitrunWebStream();
111+
112+
bench.start();
113+
lettotalBytes=0;
114+
for(leti=0;i<n;i++){
115+
totalBytes+=awaitrunWebStream();
116+
}
117+
bench.end(totalBytes/(1024*1024));
118+
}
119+
120+
asyncfunctionrunWebStream(){
121+
constfh=awaitfs.promises.open(filename,'r');
122+
try{
123+
constrs=fh.readableWebStream();
124+
125+
constupper=newTransformStream({
126+
transform(chunk,controller){
127+
constbuf=newUint8Array(chunk.length);
128+
for(leti=0;i<chunk.length;i++){
129+
constb=chunk[i];
130+
buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
131+
}
132+
controller.enqueue(buf);
133+
},
134+
});
135+
136+
constcompress=newCompressionStream('gzip');
137+
constoutput=rs.pipeThrough(upper).pipeThrough(compress);
138+
constreader=output.getReader();
139+
140+
lettotalBytes=0;
141+
while(true){
142+
const{ done, value }=awaitreader.read();
143+
if(done)break;
144+
totalBytes+=value.byteLength;
145+
}
146+
returntotalBytes;
147+
}finally{
148+
awaitfh.close();
149+
}
150+
}
151+
152+
// ---------------------------------------------------------------------------
153+
// Pull/iter path: pull() with uppercase transform + selected compression
154+
// ---------------------------------------------------------------------------
155+
asyncfunctionbenchPull(n,filesize,compression){
156+
constiter=require('zlib/iter');
157+
158+
constcompressFactory={
159+
gzip: iter.compressGzip,
160+
deflate: iter.compressDeflate,
161+
brotli: iter.compressBrotli,
162+
zstd: iter.compressZstd,
163+
}[compression];
164+
165+
// Warm up
166+
awaitrunPull(compressFactory);
167+
168+
bench.start();
169+
lettotalBytes=0;
170+
for(leti=0;i<n;i++){
171+
totalBytes+=awaitrunPull(compressFactory);
172+
}
173+
bench.end(totalBytes/(1024*1024));
174+
}
175+
176+
asyncfunctionrunPull(compressFactory){
177+
constfh=awaitfs.promises.open(filename,'r');
178+
try{
179+
// Stateless transform: uppercase each chunk in the batch
180+
constupper=(chunks)=>{
181+
if(chunks===null)returnnull;
182+
constout=newArray(chunks.length);
183+
for(letj=0;j<chunks.length;j++){
184+
out[j]=uppercaseChunk(chunks[j]);
185+
}
186+
returnout;
187+
};
188+
189+
constreadable=fh.pull(upper,compressFactory());
190+
191+
lettotalBytes=0;
192+
forawait(constchunksofreadable){
193+
for(leti=0;i<chunks.length;i++){
194+
totalBytes+=chunks[i].byteLength;
195+
}
196+
}
197+
returntotalBytes;
198+
}finally{
199+
awaitfh.close();
200+
}
201+
}
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Comments
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Commit a290f51
Browse files
jasnelladuh95
jasnell
authored and
aduh95
committed
benchmark: add benchmarks for experimental stream/iter
Signed-off-by: James M Snell <jasnell@gmail.com>
Assisted-By: Claude/Opus 4.6
PR-URL: #62066
Backport-PR-URL: #64675
Reviewed-By: Robert Nagy <ronagy@icloud.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
1 parent 14c5473 commit a290f51
9 files changed
Lines changed: 1158 additions & 0 deletions
‎benchmark/fs/bench-filehandle-pipetosync.js‎
Lines changed: 103 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,103 @@
1+
// Benchmark: pipeToSync with sync compression transforms.
2+
// Measures fully synchronous file-to-file pipeline (no threadpool, no promises).
3+
'use strict';
4+
5+
constcommon=require('../common.js');
6+
constfs=require('fs');
7+
const{ openSync, closeSync, writeSync, unlinkSync }=fs;
8+
9+
consttmpdir=require('../../test/common/tmpdir');
10+
tmpdir.refresh();
11+
constsrcFile=tmpdir.resolve(`.removeme-sync-bench-src-${process.pid}`);
12+
constdstFile=tmpdir.resolve(`.removeme-sync-bench-dst-${process.pid}`);
13+
14+
constbench=common.createBenchmark(main,{
15+
compression: ['gzip','deflate','brotli','zstd'],
16+
filesize: [1024*1024,16*1024*1024,64*1024*1024],
17+
n: [5],
18+
},{
19+
flags: ['--experimental-stream-iter'],
20+
});
21+
22+
functionmain({ compression, filesize, n }){
23+
// Create the fixture file with repeating lowercase ASCII
24+
constchunk=Buffer.alloc(Math.min(filesize,64*1024),'abcdefghij');
25+
constfd=openSync(srcFile,'w');
26+
letremaining=filesize;
27+
while(remaining>0){
28+
consttoWrite=Math.min(remaining,chunk.length);
29+
writeSync(fd,chunk,0,toWrite);
30+
remaining-=toWrite;
31+
}
32+
closeSync(fd);
33+
34+
const{ pipeToSync }=require('stream/iter');
35+
const{
36+
 compressGzipSync,
37+
 compressDeflateSync,
38+
 compressBrotliSync,
39+
 compressZstdSync,
40+
}=require('zlib/iter');
41+
const{ open }=fs.promises;
42+
43+
constcompressFactory={
44+
gzip: compressGzipSync,
45+
deflate: compressDeflateSync,
46+
brotli: compressBrotliSync,
47+
zstd: compressZstdSync,
48+
}[compression];
49+
50+
// Stateless uppercase transform (sync)
51+
constupper=(chunks)=>{
52+
if(chunks===null)returnnull;
53+
constout=newArray(chunks.length);
54+
for(letj=0;j<chunks.length;j++){
55+
constsrc=chunks[j];
56+
constbuf=Buffer.allocUnsafe(src.length);
57+
for(leti=0;i<src.length;i++){
58+
constb=src[i];
59+
buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
60+
}
61+
out[j]=buf;
62+
}
63+
returnout;
64+
};
65+
66+
// Use a synchronous wrapper since pipeToSync is fully sync.
67+
// We need FileHandle for pullSync/writer, so open async then run sync.
68+
(async()=>{
69+
constsrcFh=awaitopen(srcFile,'r');
70+
constdstFh=awaitopen(dstFile,'w');
71+
72+
// Warm up
73+
runSync(srcFh,dstFh,upper,compressFactory,pipeToSync);
74+
75+
// Reset file positions for the benchmark
76+
awaitsrcFh.close();
77+
awaitdstFh.close();
78+
79+
bench.start();
80+
lettotalBytes=0;
81+
for(leti=0;i<n;i++){
82+
constsrc=awaitopen(srcFile,'r');
83+
constdst=awaitopen(dstFile,'w');
84+
totalBytes+=runSync(src,dst,upper,compressFactory,pipeToSync);
85+
awaitsrc.close();
86+
awaitdst.close();
87+
}
88+
bench.end(totalBytes/(1024*1024));
89+
90+
cleanup();
91+
})();
92+
}
93+
94+
functionrunSync(srcFh,dstFh,upper,compressFactory,pipeToSync){
95+
constw=dstFh.writer();
96+
pipeToSync(srcFh.pullSync(upper,compressFactory()),w);
97+
returnw.endSync();
98+
}
99+
100+
functioncleanup(){
101+
try{unlinkSync(srcFile);}catch{/* Ignore */}
102+
try{unlinkSync(dstFile);}catch{/* Ignore */}
103+
}
‎benchmark/fs/bench-filehandle-pull-vs-webstream.js‎
Lines changed: 201 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,201 @@
1+
// Compare FileHandle.createReadStream() vs readableWebStream() vs pull()
2+
// reading a large file through two transforms: uppercase then compress.
3+
'use strict';
4+
5+
constcommon=require('../common.js');
6+
constfs=require('fs');
7+
constzlib=require('zlib');
8+
const{ Transform, Writable, pipeline }=require('stream');
9+
10+
consttmpdir=require('../../test/common/tmpdir');
11+
tmpdir.refresh();
12+
constfilename=tmpdir.resolve(`.removeme-benchmark-garbage-${process.pid}`);
13+
14+
constbench=common.createBenchmark(main,{
15+
api: ['classic','webstream','pull'],
16+
compression: ['gzip','deflate','brotli','zstd'],
17+
filesize: [1024*1024,16*1024*1024,64*1024*1024],
18+
n: [5],
19+
},{
20+
flags: ['--experimental-stream-iter'],
21+
// Classic and webstream only support gzip (native zlib / CompressionStream).
22+
// Brotli, deflate, zstd are pull-only via stream/iter transforms.
23+
combinationFilter({ api, compression }){
24+
if(api==='classic'&&compression!=='gzip')returnfalse;
25+
if(api==='webstream'&&compression!=='gzip')returnfalse;
26+
returntrue;
27+
},
28+
});
29+
30+
functionmain({ api, compression, filesize, n }){
31+
// Create the fixture file with repeating lowercase ASCII
32+
constchunk=Buffer.alloc(Math.min(filesize,64*1024),'abcdefghij');
33+
constfd=fs.openSync(filename,'w');
34+
letremaining=filesize;
35+
while(remaining>0){
36+
consttoWrite=Math.min(remaining,chunk.length);
37+
fs.writeSync(fd,chunk,0,toWrite);
38+
remaining-=toWrite;
39+
}
40+
fs.closeSync(fd);
41+
42+
if(api==='classic'){
43+
benchClassic(n,filesize).then(()=>cleanup());
44+
}elseif(api==='webstream'){
45+
benchWebStream(n,filesize).then(()=>cleanup());
46+
}else{
47+
benchPull(n,filesize,compression).then(()=>cleanup());
48+
}
49+
}
50+
51+
functioncleanup(){
52+
try{fs.unlinkSync(filename);}catch{/* ignore */}
53+
}
54+
55+
// Stateless uppercase transform (shared by all paths)
56+
functionuppercaseChunk(chunk){
57+
constbuf=Buffer.allocUnsafe(chunk.length);
58+
for(leti=0;i<chunk.length;i++){
59+
constb=chunk[i];
60+
buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
61+
}
62+
returnbuf;
63+
}
64+
65+
// ---------------------------------------------------------------------------
66+
// Classic streams path: createReadStream -> Transform (upper) -> createGzip
67+
// ---------------------------------------------------------------------------
68+
asyncfunctionbenchClassic(n,filesize){
69+
awaitrunClassic();
70+
71+
bench.start();
72+
lettotalBytes=0;
73+
for(leti=0;i<n;i++){
74+
totalBytes+=awaitrunClassic();
75+
}
76+
bench.end(totalBytes/(1024*1024));
77+
}
78+
79+
functionrunClassic(){
80+
returnnewPromise((resolve,reject)=>{
81+
constrs=fs.createReadStream(filename);
82+
83+
constupper=newTransform({
84+
transform(chunk,encoding,callback){
85+
callback(null,uppercaseChunk(chunk));
86+
},
87+
});
88+
89+
constgz=zlib.createGzip();
90+
91+
lettotalBytes=0;
92+
constsink=newWritable({
93+
write(chunk,encoding,callback){
94+
totalBytes+=chunk.length;
95+
callback();
96+
},
97+
});
98+
99+
pipeline(rs,upper,gz,sink,(err)=>{
100+
if(err)reject(err);
101+
elseresolve(totalBytes);
102+
});
103+
});
104+
}
105+
106+
// ---------------------------------------------------------------------------
107+
// WebStream path: readableWebStream -> TransformStream (upper) -> CompressionStream
108+
// ---------------------------------------------------------------------------
109+
asyncfunctionbenchWebStream(n,filesize){
110+
awaitrunWebStream();
111+
112+
bench.start();
113+
lettotalBytes=0;
114+
for(leti=0;i<n;i++){
115+
totalBytes+=awaitrunWebStream();
116+
}
117+
bench.end(totalBytes/(1024*1024));
118+
}
119+
120+
asyncfunctionrunWebStream(){
121+
constfh=awaitfs.promises.open(filename,'r');
122+
try{
123+
constrs=fh.readableWebStream();
124+
125+
constupper=newTransformStream({
126+
transform(chunk,controller){
127+
constbuf=newUint8Array(chunk.length);
128+
for(leti=0;i<chunk.length;i++){
129+
constb=chunk[i];
130+
buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
131+
}
132+
controller.enqueue(buf);
133+
},
134+
});
135+
136+
constcompress=newCompressionStream('gzip');
137+
constoutput=rs.pipeThrough(upper).pipeThrough(compress);
138+
constreader=output.getReader();
139+
140+
lettotalBytes=0;
141+
while(true){
142+
const{ done, value }=awaitreader.read();
143+
if(done)break;
144+
totalBytes+=value.byteLength;
145+
}
146+
returntotalBytes;
147+
}finally{
148+
awaitfh.close();
149+
}
150+
}
151+
152+
// ---------------------------------------------------------------------------
153+
// Pull/iter path: pull() with uppercase transform + selected compression
154+
// ---------------------------------------------------------------------------
155+
asyncfunctionbenchPull(n,filesize,compression){
156+
constiter=require('zlib/iter');
157+
158+
constcompressFactory={
159+
gzip: iter.compressGzip,
160+
deflate: iter.compressDeflate,
161+
brotli: iter.compressBrotli,
162+
zstd: iter.compressZstd,
163+
}[compression];
164+
165+
// Warm up
166+
awaitrunPull(compressFactory);
167+
168+
bench.start();
169+
lettotalBytes=0;
170+
for(leti=0;i<n;i++){
171+
totalBytes+=awaitrunPull(compressFactory);
172+
}
173+
bench.end(totalBytes/(1024*1024));
174+
}
175+
176+
asyncfunctionrunPull(compressFactory){
177+
constfh=awaitfs.promises.open(filename,'r');
178+
try{
179+
// Stateless transform: uppercase each chunk in the batch
180+
constupper=(chunks)=>{
181+
if(chunks===null)returnnull;
182+
constout=newArray(chunks.length);
183+
for(letj=0;j<chunks.length;j++){
184+
out[j]=uppercaseChunk(chunks[j]);
185+
}
186+
returnout;
187+
};
188+
189+
constreadable=fh.pull(upper,compressFactory());
190+
191+
lettotalBytes=0;
192+
forawait(constchunksofreadable){
193+
for(leti=0;i<chunks.length;i++){
194+
totalBytes+=chunks[i].byteLength;
195+
}
196+
}
197+
returntotalBytes;
198+
}finally{
199+
awaitfh.close();
200+
}
201+
}
0 commit comments
Comments
 (0)

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
Commit a290f51
Browse files
jasnelladuh95
jasnell
authored and
aduh95
committed
benchmark: add benchmarks for experimental stream/iter
Signed-off-by: James M Snell <jasnell@gmail.com>
Assisted-By: Claude/Opus 4.6
PR-URL: #62066
Backport-PR-URL: #64675
Reviewed-By: Robert Nagy <ronagy@icloud.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
1 parent 14c5473 commit a290f51
9 files changed
Lines changed: 1158 additions & 0 deletions
‎benchmark/fs/bench-filehandle-pipetosync.js‎
Lines changed: 103 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,103 @@
1+
// Benchmark: pipeToSync with sync compression transforms.
2+
// Measures fully synchronous file-to-file pipeline (no threadpool, no promises).
3+
'use strict';
4+
5+
constcommon=require('../common.js');
6+
constfs=require('fs');
7+
const{ openSync, closeSync, writeSync, unlinkSync }=fs;
8+
9+
consttmpdir=require('../../test/common/tmpdir');
10+
tmpdir.refresh();
11+
constsrcFile=tmpdir.resolve(`.removeme-sync-bench-src-${process.pid}`);
12+
constdstFile=tmpdir.resolve(`.removeme-sync-bench-dst-${process.pid}`);
13+
14+
constbench=common.createBenchmark(main,{
15+
compression: ['gzip','deflate','brotli','zstd'],
16+
filesize: [1024*1024,16*1024*1024,64*1024*1024],
17+
n: [5],
18+
},{
19+
flags: ['--experimental-stream-iter'],
20+
});
21+
22+
functionmain({ compression, filesize, n }){
23+
// Create the fixture file with repeating lowercase ASCII
24+
constchunk=Buffer.alloc(Math.min(filesize,64*1024),'abcdefghij');
25+
constfd=openSync(srcFile,'w');
26+
letremaining=filesize;
27+
while(remaining>0){
28+
consttoWrite=Math.min(remaining,chunk.length);
29+
writeSync(fd,chunk,0,toWrite);
30+
remaining-=toWrite;
31+
}
32+
closeSync(fd);
33+
34+
const{ pipeToSync }=require('stream/iter');
35+
const{
36+
 compressGzipSync,
37+
 compressDeflateSync,
38+
 compressBrotliSync,
39+
 compressZstdSync,
40+
}=require('zlib/iter');
41+
const{ open }=fs.promises;
42+
43+
constcompressFactory={
44+
gzip: compressGzipSync,
45+
deflate: compressDeflateSync,
46+
brotli: compressBrotliSync,
47+
zstd: compressZstdSync,
48+
}[compression];
49+
50+
// Stateless uppercase transform (sync)
51+
constupper=(chunks)=>{
52+
if(chunks===null)returnnull;
53+
constout=newArray(chunks.length);
54+
for(letj=0;j<chunks.length;j++){
55+
constsrc=chunks[j];
56+
constbuf=Buffer.allocUnsafe(src.length);
57+
for(leti=0;i<src.length;i++){
58+
constb=src[i];
59+
buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
60+
}
61+
out[j]=buf;
62+
}
63+
returnout;
64+
};
65+
66+
// Use a synchronous wrapper since pipeToSync is fully sync.
67+
// We need FileHandle for pullSync/writer, so open async then run sync.
68+
(async()=>{
69+
constsrcFh=awaitopen(srcFile,'r');
70+
constdstFh=awaitopen(dstFile,'w');
71+
72+
// Warm up
73+
runSync(srcFh,dstFh,upper,compressFactory,pipeToSync);
74+
75+
// Reset file positions for the benchmark
76+
awaitsrcFh.close();
77+
awaitdstFh.close();
78+
79+
bench.start();
80+
lettotalBytes=0;
81+
for(leti=0;i<n;i++){
82+
constsrc=awaitopen(srcFile,'r');
83+
constdst=awaitopen(dstFile,'w');
84+
totalBytes+=runSync(src,dst,upper,compressFactory,pipeToSync);
85+
awaitsrc.close();
86+
awaitdst.close();
87+
}
88+
bench.end(totalBytes/(1024*1024));
89+
90+
cleanup();
91+
})();
92+
}
93+
94+
functionrunSync(srcFh,dstFh,upper,compressFactory,pipeToSync){
95+
constw=dstFh.writer();
96+
pipeToSync(srcFh.pullSync(upper,compressFactory()),w);
97+
returnw.endSync();
98+
}
99+
100+
functioncleanup(){
101+
try{unlinkSync(srcFile);}catch{/* Ignore */}
102+
try{unlinkSync(dstFile);}catch{/* Ignore */}
103+
}
‎benchmark/fs/bench-filehandle-pull-vs-webstream.js‎
Lines changed: 201 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,201 @@
1+
// Compare FileHandle.createReadStream() vs readableWebStream() vs pull()
2+
// reading a large file through two transforms: uppercase then compress.
3+
'use strict';
4+
5+
constcommon=require('../common.js');
6+
constfs=require('fs');
7+
constzlib=require('zlib');
8+
const{ Transform, Writable, pipeline }=require('stream');
9+
10+
consttmpdir=require('../../test/common/tmpdir');
11+
tmpdir.refresh();
12+
constfilename=tmpdir.resolve(`.removeme-benchmark-garbage-${process.pid}`);
13+
14+
constbench=common.createBenchmark(main,{
15+
api: ['classic','webstream','pull'],
16+
compression: ['gzip','deflate','brotli','zstd'],
17+
filesize: [1024*1024,16*1024*1024,64*1024*1024],
18+
n: [5],
19+
},{
20+
flags: ['--experimental-stream-iter'],
21+
// Classic and webstream only support gzip (native zlib / CompressionStream).
22+
// Brotli, deflate, zstd are pull-only via stream/iter transforms.
23+
combinationFilter({ api, compression }){
24+
if(api==='classic'&&compression!=='gzip')returnfalse;
25+
if(api==='webstream'&&compression!=='gzip')returnfalse;
26+
returntrue;
27+
},
28+
});
29+
30+
functionmain({ api, compression, filesize, n }){
31+
// Create the fixture file with repeating lowercase ASCII
32+
constchunk=Buffer.alloc(Math.min(filesize,64*1024),'abcdefghij');
33+
constfd=fs.openSync(filename,'w');
34+
letremaining=filesize;
35+
while(remaining>0){
36+
consttoWrite=Math.min(remaining,chunk.length);
37+
fs.writeSync(fd,chunk,0,toWrite);
38+
remaining-=toWrite;
39+
}
40+
fs.closeSync(fd);
41+
42+
if(api==='classic'){
43+
benchClassic(n,filesize).then(()=>cleanup());
44+
}elseif(api==='webstream'){
45+
benchWebStream(n,filesize).then(()=>cleanup());
46+
}else{
47+
benchPull(n,filesize,compression).then(()=>cleanup());
48+
}
49+
}
50+
51+
functioncleanup(){
52+
try{fs.unlinkSync(filename);}catch{/* ignore */}
53+
}
54+
55+
// Stateless uppercase transform (shared by all paths)
56+
functionuppercaseChunk(chunk){
57+
constbuf=Buffer.allocUnsafe(chunk.length);
58+
for(leti=0;i<chunk.length;i++){
59+
constb=chunk[i];
60+
buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
61+
}
62+
returnbuf;
63+
}
64+
65+
// ---------------------------------------------------------------------------
66+
// Classic streams path: createReadStream -> Transform (upper) -> createGzip
67+
// ---------------------------------------------------------------------------
68+
asyncfunctionbenchClassic(n,filesize){
69+
awaitrunClassic();
70+
71+
bench.start();
72+
lettotalBytes=0;
73+
for(leti=0;i<n;i++){
74+
totalBytes+=awaitrunClassic();
75+
}
76+
bench.end(totalBytes/(1024*1024));
77+
}
78+
79+
functionrunClassic(){
80+
returnnewPromise((resolve,reject)=>{
81+
constrs=fs.createReadStream(filename);
82+
83+
constupper=newTransform({
84+
transform(chunk,encoding,callback){
85+
callback(null,uppercaseChunk(chunk));
86+
},
87+
});
88+
89+
constgz=zlib.createGzip();
90+
91+
lettotalBytes=0;
92+
constsink=newWritable({
93+
write(chunk,encoding,callback){
94+
totalBytes+=chunk.length;
95+
callback();
96+
},
97+
});
98+
99+
pipeline(rs,upper,gz,sink,(err)=>{
100+
if(err)reject(err);
101+
elseresolve(totalBytes);
102+
});
103+
});
104+
}
105+
106+
// ---------------------------------------------------------------------------
107+
// WebStream path: readableWebStream -> TransformStream (upper) -> CompressionStream
108+
// ---------------------------------------------------------------------------
109+
asyncfunctionbenchWebStream(n,filesize){
110+
awaitrunWebStream();
111+
112+
bench.start();
113+
lettotalBytes=0;
114+
for(leti=0;i<n;i++){
115+
totalBytes+=awaitrunWebStream();
116+
}
117+
bench.end(totalBytes/(1024*1024));
118+
}
119+
120+
asyncfunctionrunWebStream(){
121+
constfh=awaitfs.promises.open(filename,'r');
122+
try{
123+
constrs=fh.readableWebStream();
124+
125+
constupper=newTransformStream({
126+
transform(chunk,controller){
127+
constbuf=newUint8Array(chunk.length);
128+
for(leti=0;i<chunk.length;i++){
129+
constb=chunk[i];
130+
buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
131+
}
132+
controller.enqueue(buf);
133+
},
134+
});
135+
136+
constcompress=newCompressionStream('gzip');
137+
constoutput=rs.pipeThrough(upper).pipeThrough(compress);
138+
constreader=output.getReader();
139+
140+
lettotalBytes=0;
141+
while(true){
142+
const{ done, value }=awaitreader.read();
143+
if(done)break;
144+
totalBytes+=value.byteLength;
145+
}
146+
returntotalBytes;
147+
}finally{
148+
awaitfh.close();
149+
}
150+
}
151+
152+
// ---------------------------------------------------------------------------
153+
// Pull/iter path: pull() with uppercase transform + selected compression
154+
// ---------------------------------------------------------------------------
155+
asyncfunctionbenchPull(n,filesize,compression){
156+
constiter=require('zlib/iter');
157+
158+
constcompressFactory={
159+
gzip: iter.compressGzip,
160+
deflate: iter.compressDeflate,
161+
brotli: iter.compressBrotli,
162+
zstd: iter.compressZstd,
163+
}[compression];
164+
165+
// Warm up
166+
awaitrunPull(compressFactory);
167+
168+
bench.start();
169+
lettotalBytes=0;
170+
for(leti=0;i<n;i++){
171+
totalBytes+=awaitrunPull(compressFactory);
172+
}
173+
bench.end(totalBytes/(1024*1024));
174+
}
175+
176+
asyncfunctionrunPull(compressFactory){
177+
constfh=awaitfs.promises.open(filename,'r');
178+
try{
179+
// Stateless transform: uppercase each chunk in the batch
180+
constupper=(chunks)=>{
181+
if(chunks===null)returnnull;
182+
constout=newArray(chunks.length);
183+
for(letj=0;j<chunks.length;j++){
184+
out[j]=uppercaseChunk(chunks[j]);
185+
}
186+
returnout;
187+
};
188+
189+
constreadable=fh.pull(upper,compressFactory());
190+
191+
lettotalBytes=0;
192+
forawait(constchunksofreadable){
193+
for(leti=0;i<chunks.length;i++){
194+
totalBytes+=chunks[i].byteLength;
195+
}
196+
}
197+
returntotalBytes;
198+
}finally{
199+
awaitfh.close();
200+
}
201+
}
0 commit comments
Comments
 (0)

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Commit a290f51
Browse files
jasnelladuh95
jasnell
authored and
aduh95
committed
benchmark: add benchmarks for experimental stream/iter
Signed-off-by: James M Snell <jasnell@gmail.com>
Assisted-By: Claude/Opus 4.6
PR-URL: #62066
Backport-PR-URL: #64675
Reviewed-By: Robert Nagy <ronagy@icloud.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
1 parent 14c5473 commit a290f51
9 files changed
Lines changed: 1158 additions & 0 deletions
‎benchmark/fs/bench-filehandle-pipetosync.js‎
Lines changed: 103 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,103 @@
1+
// Benchmark: pipeToSync with sync compression transforms.
2+
// Measures fully synchronous file-to-file pipeline (no threadpool, no promises).
3+
'use strict';
4+
5+
constcommon=require('../common.js');
6+
constfs=require('fs');
7+
const{ openSync, closeSync, writeSync, unlinkSync }=fs;
8+
9+
consttmpdir=require('../../test/common/tmpdir');
10+
tmpdir.refresh();
11+
constsrcFile=tmpdir.resolve(`.removeme-sync-bench-src-${process.pid}`);
12+
constdstFile=tmpdir.resolve(`.removeme-sync-bench-dst-${process.pid}`);
13+
14+
constbench=common.createBenchmark(main,{
15+
compression: ['gzip','deflate','brotli','zstd'],
16+
filesize: [1024*1024,16*1024*1024,64*1024*1024],
17+
n: [5],
18+
},{
19+
flags: ['--experimental-stream-iter'],
20+
});
21+
22+
functionmain({ compression, filesize, n }){
23+
// Create the fixture file with repeating lowercase ASCII
24+
constchunk=Buffer.alloc(Math.min(filesize,64*1024),'abcdefghij');
25+
constfd=openSync(srcFile,'w');
26+
letremaining=filesize;
27+
while(remaining>0){
28+
consttoWrite=Math.min(remaining,chunk.length);
29+
writeSync(fd,chunk,0,toWrite);
30+
remaining-=toWrite;
31+
}
32+
closeSync(fd);
33+
34+
const{ pipeToSync }=require('stream/iter');
35+
const{
36+
 compressGzipSync,
37+
 compressDeflateSync,
38+
 compressBrotliSync,
39+
 compressZstdSync,
40+
}=require('zlib/iter');
41+
const{ open }=fs.promises;
42+
43+
constcompressFactory={
44+
gzip: compressGzipSync,
45+
deflate: compressDeflateSync,
46+
brotli: compressBrotliSync,
47+
zstd: compressZstdSync,
48+
}[compression];
49+
50+
// Stateless uppercase transform (sync)
51+
constupper=(chunks)=>{
52+
if(chunks===null)returnnull;
53+
constout=newArray(chunks.length);
54+
for(letj=0;j<chunks.length;j++){
55+
constsrc=chunks[j];
56+
constbuf=Buffer.allocUnsafe(src.length);
57+
for(leti=0;i<src.length;i++){
58+
constb=src[i];
59+
buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
60+
}
61+
out[j]=buf;
62+
}
63+
returnout;
64+
};
65+
66+
// Use a synchronous wrapper since pipeToSync is fully sync.
67+
// We need FileHandle for pullSync/writer, so open async then run sync.
68+
(async()=>{
69+
constsrcFh=awaitopen(srcFile,'r');
70+
constdstFh=awaitopen(dstFile,'w');
71+
72+
// Warm up
73+
runSync(srcFh,dstFh,upper,compressFactory,pipeToSync);
74+
75+
// Reset file positions for the benchmark
76+
awaitsrcFh.close();
77+
awaitdstFh.close();
78+
79+
bench.start();
80+
lettotalBytes=0;
81+
for(leti=0;i<n;i++){
82+
constsrc=awaitopen(srcFile,'r');
83+
constdst=awaitopen(dstFile,'w');
84+
totalBytes+=runSync(src,dst,upper,compressFactory,pipeToSync);
85+
awaitsrc.close();
86+
awaitdst.close();
87+
}
88+
bench.end(totalBytes/(1024*1024));
89+
90+
cleanup();
91+
})();
92+
}
93+
94+
functionrunSync(srcFh,dstFh,upper,compressFactory,pipeToSync){
95+
constw=dstFh.writer();
96+
pipeToSync(srcFh.pullSync(upper,compressFactory()),w);
97+
returnw.endSync();
98+
}
99+
100+
functioncleanup(){
101+
try{unlinkSync(srcFile);}catch{/* Ignore */}
102+
try{unlinkSync(dstFile);}catch{/* Ignore */}
103+
}
‎benchmark/fs/bench-filehandle-pull-vs-webstream.js‎
Lines changed: 201 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,201 @@
1+
// Compare FileHandle.createReadStream() vs readableWebStream() vs pull()
2+
// reading a large file through two transforms: uppercase then compress.
3+
'use strict';
4+
5+
constcommon=require('../common.js');
6+
constfs=require('fs');
7+
constzlib=require('zlib');
8+
const{ Transform, Writable, pipeline }=require('stream');
9+
10+
consttmpdir=require('../../test/common/tmpdir');
11+
tmpdir.refresh();
12+
constfilename=tmpdir.resolve(`.removeme-benchmark-garbage-${process.pid}`);
13+
14+
constbench=common.createBenchmark(main,{
15+
api: ['classic','webstream','pull'],
16+
compression: ['gzip','deflate','brotli','zstd'],
17+
filesize: [1024*1024,16*1024*1024,64*1024*1024],
18+
n: [5],
19+
},{
20+
flags: ['--experimental-stream-iter'],
21+
// Classic and webstream only support gzip (native zlib / CompressionStream).
22+
// Brotli, deflate, zstd are pull-only via stream/iter transforms.
23+
combinationFilter({ api, compression }){
24+
if(api==='classic'&&compression!=='gzip')returnfalse;
25+
if(api==='webstream'&&compression!=='gzip')returnfalse;
26+
returntrue;
27+
},
28+
});
29+
30+
functionmain({ api, compression, filesize, n }){
31+
// Create the fixture file with repeating lowercase ASCII
32+
constchunk=Buffer.alloc(Math.min(filesize,64*1024),'abcdefghij');
33+
constfd=fs.openSync(filename,'w');
34+
letremaining=filesize;
35+
while(remaining>0){
36+
consttoWrite=Math.min(remaining,chunk.length);
37+
fs.writeSync(fd,chunk,0,toWrite);
38+
remaining-=toWrite;
39+
}
40+
fs.closeSync(fd);
41+
42+
if(api==='classic'){
43+
benchClassic(n,filesize).then(()=>cleanup());
44+
}elseif(api==='webstream'){
45+
benchWebStream(n,filesize).then(()=>cleanup());
46+
}else{
47+
benchPull(n,filesize,compression).then(()=>cleanup());
48+
}
49+
}
50+
51+
functioncleanup(){
52+
try{fs.unlinkSync(filename);}catch{/* ignore */}
53+
}
54+
55+
// Stateless uppercase transform (shared by all paths)
56+
functionuppercaseChunk(chunk){
57+
constbuf=Buffer.allocUnsafe(chunk.length);
58+
for(leti=0;i<chunk.length;i++){
59+
constb=chunk[i];
60+
buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
61+
}
62+
returnbuf;
63+
}
64+
65+
// ---------------------------------------------------------------------------
66+
// Classic streams path: createReadStream -> Transform (upper) -> createGzip
67+
// ---------------------------------------------------------------------------
68+
asyncfunctionbenchClassic(n,filesize){
69+
awaitrunClassic();
70+
71+
bench.start();
72+
lettotalBytes=0;
73+
for(leti=0;i<n;i++){
74+
totalBytes+=awaitrunClassic();
75+
}
76+
bench.end(totalBytes/(1024*1024));
77+
}
78+
79+
functionrunClassic(){
80+
returnnewPromise((resolve,reject)=>{
81+
constrs=fs.createReadStream(filename);
82+
83+
constupper=newTransform({
84+
transform(chunk,encoding,callback){
85+
callback(null,uppercaseChunk(chunk));
86+
},
87+
});
88+
89+
constgz=zlib.createGzip();
90+
91+
lettotalBytes=0;
92+
constsink=newWritable({
93+
write(chunk,encoding,callback){
94+
totalBytes+=chunk.length;
95+
callback();
96+
},
97+
});
98+
99+
pipeline(rs,upper,gz,sink,(err)=>{
100+
if(err)reject(err);
101+
elseresolve(totalBytes);
102+
});
103+
});
104+
}
105+
106+
// ---------------------------------------------------------------------------
107+
// WebStream path: readableWebStream -> TransformStream (upper) -> CompressionStream
108+
// ---------------------------------------------------------------------------
109+
asyncfunctionbenchWebStream(n,filesize){
110+
awaitrunWebStream();
111+
112+
bench.start();
113+
lettotalBytes=0;
114+
for(leti=0;i<n;i++){
115+
totalBytes+=awaitrunWebStream();
116+
}
117+
bench.end(totalBytes/(1024*1024));
118+
}
119+
120+
asyncfunctionrunWebStream(){
121+
constfh=awaitfs.promises.open(filename,'r');
122+
try{
123+
constrs=fh.readableWebStream();
124+
125+
constupper=newTransformStream({
126+
transform(chunk,controller){
127+
constbuf=newUint8Array(chunk.length);
128+
for(leti=0;i<chunk.length;i++){
129+
constb=chunk[i];
130+
buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
131+
}
132+
controller.enqueue(buf);
133+
},
134+
});
135+
136+
constcompress=newCompressionStream('gzip');
137+
constoutput=rs.pipeThrough(upper).pipeThrough(compress);
138+
constreader=output.getReader();
139+
140+
lettotalBytes=0;
141+
while(true){
142+
const{ done, value }=awaitreader.read();
143+
if(done)break;
144+
totalBytes+=value.byteLength;
145+
}
146+
returntotalBytes;
147+
}finally{
148+
awaitfh.close();
149+
}
150+
}
151+
152+
// ---------------------------------------------------------------------------
153+
// Pull/iter path: pull() with uppercase transform + selected compression
154+
// ---------------------------------------------------------------------------
155+
asyncfunctionbenchPull(n,filesize,compression){
156+
constiter=require('zlib/iter');
157+
158+
constcompressFactory={
159+
gzip: iter.compressGzip,
160+
deflate: iter.compressDeflate,
161+
brotli: iter.compressBrotli,
162+
zstd: iter.compressZstd,
163+
}[compression];
164+
165+
// Warm up
166+
awaitrunPull(compressFactory);
167+
168+
bench.start();
169+
lettotalBytes=0;
170+
for(leti=0;i<n;i++){
171+
totalBytes+=awaitrunPull(compressFactory);
172+
}
173+
bench.end(totalBytes/(1024*1024));
174+
}
175+
176+
asyncfunctionrunPull(compressFactory){
177+
constfh=awaitfs.promises.open(filename,'r');
178+
try{
179+
// Stateless transform: uppercase each chunk in the batch
180+
constupper=(chunks)=>{
181+
if(chunks===null)returnnull;
182+
constout=newArray(chunks.length);
183+
for(letj=0;j<chunks.length;j++){
184+
out[j]=uppercaseChunk(chunks[j]);
185+
}
186+
returnout;
187+
};
188+
189+
constreadable=fh.pull(upper,compressFactory());
190+
191+
lettotalBytes=0;
192+
forawait(constchunksofreadable){
193+
for(leti=0;i<chunks.length;i++){
194+
totalBytes+=chunks[i].byteLength;
195+
}
196+
}
197+
returntotalBytes;
198+
}finally{
199+
awaitfh.close();
200+
}
201+
}
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Skip to content
Commit a290f51
Browse files
jasnelladuh95
jasnell
authored and
aduh95
committed
benchmark: add benchmarks for experimental stream/iter
Signed-off-by: James M Snell <jasnell@gmail.com>
Assisted-By: Claude/Opus 4.6
PR-URL: #62066
Backport-PR-URL: #64675
Reviewed-By: Robert Nagy <ronagy@icloud.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
1 parent 14c5473 commit a290f51
9 files changed
Lines changed: 1158 additions & 0 deletions
‎benchmark/fs/bench-filehandle-pipetosync.js‎
Lines changed: 103 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,103 @@
1+
// Benchmark: pipeToSync with sync compression transforms.
2+
// Measures fully synchronous file-to-file pipeline (no threadpool, no promises).
3+
'use strict';
4+
5+
constcommon=require('../common.js');
6+
constfs=require('fs');
7+
const{ openSync, closeSync, writeSync, unlinkSync }=fs;
8+
9+
consttmpdir=require('../../test/common/tmpdir');
10+
tmpdir.refresh();
11+
constsrcFile=tmpdir.resolve(`.removeme-sync-bench-src-${process.pid}`);
12+
constdstFile=tmpdir.resolve(`.removeme-sync-bench-dst-${process.pid}`);
13+
14+
constbench=common.createBenchmark(main,{
15+
compression: ['gzip','deflate','brotli','zstd'],
16+
filesize: [1024*1024,16*1024*1024,64*1024*1024],
17+
n: [5],
18+
},{
19+
flags: ['--experimental-stream-iter'],
20+
});
21+
22+
functionmain({ compression, filesize, n }){
23+
// Create the fixture file with repeating lowercase ASCII
24+
constchunk=Buffer.alloc(Math.min(filesize,64*1024),'abcdefghij');
25+
constfd=openSync(srcFile,'w');
26+
letremaining=filesize;
27+
while(remaining>0){
28+
consttoWrite=Math.min(remaining,chunk.length);
29+
writeSync(fd,chunk,0,toWrite);
30+
remaining-=toWrite;
31+
}
32+
closeSync(fd);
33+
34+
const{ pipeToSync }=require('stream/iter');
35+
const{
36+
 compressGzipSync,
37+
 compressDeflateSync,
38+
 compressBrotliSync,
39+
 compressZstdSync,
40+
}=require('zlib/iter');
41+
const{ open }=fs.promises;
42+
43+
constcompressFactory={
44+
gzip: compressGzipSync,
45+
deflate: compressDeflateSync,
46+
brotli: compressBrotliSync,
47+
zstd: compressZstdSync,
48+
}[compression];
49+
50+
// Stateless uppercase transform (sync)
51+
constupper=(chunks)=>{
52+
if(chunks===null)returnnull;
53+
constout=newArray(chunks.length);
54+
for(letj=0;j<chunks.length;j++){
55+
constsrc=chunks[j];
56+
constbuf=Buffer.allocUnsafe(src.length);
57+
for(leti=0;i<src.length;i++){
58+
constb=src[i];
59+
buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
60+
}
61+
out[j]=buf;
62+
}
63+
returnout;
64+
};
65+
66+
// Use a synchronous wrapper since pipeToSync is fully sync.
67+
// We need FileHandle for pullSync/writer, so open async then run sync.
68+
(async()=>{
69+
constsrcFh=awaitopen(srcFile,'r');
70+
constdstFh=awaitopen(dstFile,'w');
71+
72+
// Warm up
73+
runSync(srcFh,dstFh,upper,compressFactory,pipeToSync);
74+
75+
// Reset file positions for the benchmark
76+
awaitsrcFh.close();
77+
awaitdstFh.close();
78+
79+
bench.start();
80+
lettotalBytes=0;
81+
for(leti=0;i<n;i++){
82+
constsrc=awaitopen(srcFile,'r');
83+
constdst=awaitopen(dstFile,'w');
84+
totalBytes+=runSync(src,dst,upper,compressFactory,pipeToSync);
85+
awaitsrc.close();
86+
awaitdst.close();
87+
}
88+
bench.end(totalBytes/(1024*1024));
89+
90+
cleanup();
91+
})();
92+
}
93+
94+
functionrunSync(srcFh,dstFh,upper,compressFactory,pipeToSync){
95+
constw=dstFh.writer();
96+
pipeToSync(srcFh.pullSync(upper,compressFactory()),w);
97+
returnw.endSync();
98+
}
99+
100+
functioncleanup(){
101+
try{unlinkSync(srcFile);}catch{/* Ignore */}
102+
try{unlinkSync(dstFile);}catch{/* Ignore */}
103+
}
‎benchmark/fs/bench-filehandle-pull-vs-webstream.js‎
Lines changed: 201 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,201 @@
1+
// Compare FileHandle.createReadStream() vs readableWebStream() vs pull()
2+
// reading a large file through two transforms: uppercase then compress.
3+
'use strict';
4+
5+
constcommon=require('../common.js');
6+
constfs=require('fs');
7+
constzlib=require('zlib');
8+
const{ Transform, Writable, pipeline }=require('stream');
9+
10+
consttmpdir=require('../../test/common/tmpdir');
11+
tmpdir.refresh();
12+
constfilename=tmpdir.resolve(`.removeme-benchmark-garbage-${process.pid}`);
13+
14+
constbench=common.createBenchmark(main,{
15+
api: ['classic','webstream','pull'],
16+
compression: ['gzip','deflate','brotli','zstd'],
17+
filesize: [1024*1024,16*1024*1024,64*1024*1024],
18+
n: [5],
19+
},{
20+
flags: ['--experimental-stream-iter'],
21+
// Classic and webstream only support gzip (native zlib / CompressionStream).
22+
// Brotli, deflate, zstd are pull-only via stream/iter transforms.
23+
combinationFilter({ api, compression }){
24+
if(api==='classic'&&compression!=='gzip')returnfalse;
25+
if(api==='webstream'&&compression!=='gzip')returnfalse;
26+
returntrue;
27+
},
28+
});
29+
30+
functionmain({ api, compression, filesize, n }){
31+
// Create the fixture file with repeating lowercase ASCII
32+
constchunk=Buffer.alloc(Math.min(filesize,64*1024),'abcdefghij');
33+
constfd=fs.openSync(filename,'w');
34+
letremaining=filesize;
35+
while(remaining>0){
36+
consttoWrite=Math.min(remaining,chunk.length);
37+
fs.writeSync(fd,chunk,0,toWrite);
38+
remaining-=toWrite;
39+
}
40+
fs.closeSync(fd);
41+
42+
if(api==='classic'){
43+
benchClassic(n,filesize).then(()=>cleanup());
44+
}elseif(api==='webstream'){
45+
benchWebStream(n,filesize).then(()=>cleanup());
46+
}else{
47+
benchPull(n,filesize,compression).then(()=>cleanup());
48+
}
49+
}
50+
51+
functioncleanup(){
52+
try{fs.unlinkSync(filename);}catch{/* ignore */}
53+
}
54+
55+
// Stateless uppercase transform (shared by all paths)
56+
functionuppercaseChunk(chunk){
57+
constbuf=Buffer.allocUnsafe(chunk.length);
58+
for(leti=0;i<chunk.length;i++){
59+
constb=chunk[i];
60+
buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
61+
}
62+
returnbuf;
63+
}
64+
65+
// ---------------------------------------------------------------------------
66+
// Classic streams path: createReadStream -> Transform (upper) -> createGzip
67+
// ---------------------------------------------------------------------------
68+
asyncfunctionbenchClassic(n,filesize){
69+
awaitrunClassic();
70+
71+
bench.start();
72+
lettotalBytes=0;
73+
for(leti=0;i<n;i++){
74+
totalBytes+=awaitrunClassic();
75+
}
76+
bench.end(totalBytes/(1024*1024));
77+
}
78+
79+
functionrunClassic(){
80+
returnnewPromise((resolve,reject)=>{
81+
constrs=fs.createReadStream(filename);
82+
83+
constupper=newTransform({
84+
transform(chunk,encoding,callback){
85+
callback(null,uppercaseChunk(chunk));
86+
},
87+
});
88+
89+
constgz=zlib.createGzip();
90+
91+
lettotalBytes=0;
92+
constsink=newWritable({
93+
write(chunk,encoding,callback){
94+
totalBytes+=chunk.length;
95+
callback();
96+
},
97+
});
98+
99+
pipeline(rs,upper,gz,sink,(err)=>{
100+
if(err)reject(err);
101+
elseresolve(totalBytes);
102+
});
103+
});
104+
}
105+
106+
// ---------------------------------------------------------------------------
107+
// WebStream path: readableWebStream -> TransformStream (upper) -> CompressionStream
108+
// ---------------------------------------------------------------------------
109+
asyncfunctionbenchWebStream(n,filesize){
110+
awaitrunWebStream();
111+
112+
bench.start();
113+
lettotalBytes=0;
114+
for(leti=0;i<n;i++){
115+
totalBytes+=awaitrunWebStream();
116+
}
117+
bench.end(totalBytes/(1024*1024));
118+
}
119+
120+
asyncfunctionrunWebStream(){
121+
constfh=awaitfs.promises.open(filename,'r');
122+
try{
123+
constrs=fh.readableWebStream();
124+
125+
constupper=newTransformStream({
126+
transform(chunk,controller){
127+
constbuf=newUint8Array(chunk.length);
128+
for(leti=0;i<chunk.length;i++){
129+
constb=chunk[i];
130+
buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
131+
}
132+
controller.enqueue(buf);
133+
},
134+
});
135+
136+
constcompress=newCompressionStream('gzip');
137+
constoutput=rs.pipeThrough(upper).pipeThrough(compress);
138+
constreader=output.getReader();
139+
140+
lettotalBytes=0;
141+
while(true){
142+
const{ done, value }=awaitreader.read();
143+
if(done)break;
144+
totalBytes+=value.byteLength;
145+
}
146+
returntotalBytes;
147+
}finally{
148+
awaitfh.close();
149+
}
150+
}
151+
152+
// ---------------------------------------------------------------------------
153+
// Pull/iter path: pull() with uppercase transform + selected compression
154+
// ---------------------------------------------------------------------------
155+
asyncfunctionbenchPull(n,filesize,compression){
156+
constiter=require('zlib/iter');
157+
158+
constcompressFactory={
159+
gzip: iter.compressGzip,
160+
deflate: iter.compressDeflate,
161+
brotli: iter.compressBrotli,
162+
zstd: iter.compressZstd,
163+
}[compression];
164+
165+
// Warm up
166+
awaitrunPull(compressFactory);
167+
168+
bench.start();
169+
lettotalBytes=0;
170+
for(leti=0;i<n;i++){
171+
totalBytes+=awaitrunPull(compressFactory);
172+
}
173+
bench.end(totalBytes/(1024*1024));
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}
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asyncfunctionrunPull(compressFactory){
177+
constfh=awaitfs.promises.open(filename,'r');
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try{
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// Stateless transform: uppercase each chunk in the batch
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constupper=(chunks)=>{
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if(chunks===null)returnnull;
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constout=newArray(chunks.length);
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for(letj=0;j<chunks.length;j++){
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out[j]=uppercaseChunk(chunks[j]);
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}
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returnout;
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};
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constreadable=fh.pull(upper,compressFactory());
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lettotalBytes=0;
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forawait(constchunksofreadable){
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for(leti=0;i<chunks.length;i++){
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totalBytes+=chunks[i].byteLength;
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}
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}
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returntotalBytes;
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}finally{
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awaitfh.close();
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}
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}
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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jasnelladuh95
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authored and
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committed
benchmark: add benchmarks for experimental stream/iter
Signed-off-by: James M Snell <jasnell@gmail.com>
Assisted-By: Claude/Opus 4.6
PR-URL: #62066
Backport-PR-URL: #64675
Reviewed-By: Robert Nagy <ronagy@icloud.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
1 parent 14c5473 commit a290f51
9 files changed
Lines changed: 1158 additions & 0 deletions
‎benchmark/fs/bench-filehandle-pipetosync.js‎
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// Benchmark: pipeToSync with sync compression transforms.
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// Measures fully synchronous file-to-file pipeline (no threadpool, no promises).
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'use strict';
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constcommon=require('../common.js');
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constfs=require('fs');
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const{ openSync, closeSync, writeSync, unlinkSync }=fs;
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consttmpdir=require('../../test/common/tmpdir');
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tmpdir.refresh();
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constsrcFile=tmpdir.resolve(`.removeme-sync-bench-src-${process.pid}`);
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constdstFile=tmpdir.resolve(`.removeme-sync-bench-dst-${process.pid}`);
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constbench=common.createBenchmark(main,{
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compression: ['gzip','deflate','brotli','zstd'],
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filesize: [1024*1024,16*1024*1024,64*1024*1024],
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n: [5],
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},{
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flags: ['--experimental-stream-iter'],
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});
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functionmain({ compression, filesize, n }){
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// Create the fixture file with repeating lowercase ASCII
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constchunk=Buffer.alloc(Math.min(filesize,64*1024),'abcdefghij');
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constfd=openSync(srcFile,'w');
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letremaining=filesize;
27+
while(remaining>0){
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consttoWrite=Math.min(remaining,chunk.length);
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writeSync(fd,chunk,0,toWrite);
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remaining-=toWrite;
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}
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closeSync(fd);
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const{ pipeToSync }=require('stream/iter');
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const{
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 compressGzipSync,
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 compressDeflateSync,
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 compressBrotliSync,
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 compressZstdSync,
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}=require('zlib/iter');
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const{ open }=fs.promises;
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constcompressFactory={
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gzip: compressGzipSync,
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deflate: compressDeflateSync,
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brotli: compressBrotliSync,
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zstd: compressZstdSync,
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}[compression];
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// Stateless uppercase transform (sync)
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constupper=(chunks)=>{
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if(chunks===null)returnnull;
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constout=newArray(chunks.length);
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for(letj=0;j<chunks.length;j++){
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constsrc=chunks[j];
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constbuf=Buffer.allocUnsafe(src.length);
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for(leti=0;i<src.length;i++){
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constb=src[i];
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buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
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}
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out[j]=buf;
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}
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returnout;
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};
65+
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// Use a synchronous wrapper since pipeToSync is fully sync.
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// We need FileHandle for pullSync/writer, so open async then run sync.
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(async()=>{
69+
constsrcFh=awaitopen(srcFile,'r');
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constdstFh=awaitopen(dstFile,'w');
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// Warm up
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runSync(srcFh,dstFh,upper,compressFactory,pipeToSync);
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// Reset file positions for the benchmark
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awaitsrcFh.close();
77+
awaitdstFh.close();
78+
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bench.start();
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lettotalBytes=0;
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for(leti=0;i<n;i++){
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constsrc=awaitopen(srcFile,'r');
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constdst=awaitopen(dstFile,'w');
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totalBytes+=runSync(src,dst,upper,compressFactory,pipeToSync);
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awaitsrc.close();
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awaitdst.close();
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}
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bench.end(totalBytes/(1024*1024));
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90+
cleanup();
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})();
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}
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functionrunSync(srcFh,dstFh,upper,compressFactory,pipeToSync){
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constw=dstFh.writer();
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pipeToSync(srcFh.pullSync(upper,compressFactory()),w);
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returnw.endSync();
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}
99+
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functioncleanup(){
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try{unlinkSync(srcFile);}catch{/* Ignore */}
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try{unlinkSync(dstFile);}catch{/* Ignore */}
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}
‎benchmark/fs/bench-filehandle-pull-vs-webstream.js‎
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// Compare FileHandle.createReadStream() vs readableWebStream() vs pull()
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// reading a large file through two transforms: uppercase then compress.
3+
'use strict';
4+
5+
constcommon=require('../common.js');
6+
constfs=require('fs');
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constzlib=require('zlib');
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const{ Transform, Writable, pipeline }=require('stream');
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consttmpdir=require('../../test/common/tmpdir');
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tmpdir.refresh();
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constfilename=tmpdir.resolve(`.removeme-benchmark-garbage-${process.pid}`);
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14+
constbench=common.createBenchmark(main,{
15+
api: ['classic','webstream','pull'],
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compression: ['gzip','deflate','brotli','zstd'],
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filesize: [1024*1024,16*1024*1024,64*1024*1024],
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n: [5],
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},{
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flags: ['--experimental-stream-iter'],
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// Classic and webstream only support gzip (native zlib / CompressionStream).
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// Brotli, deflate, zstd are pull-only via stream/iter transforms.
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combinationFilter({ api, compression }){
24+
if(api==='classic'&&compression!=='gzip')returnfalse;
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if(api==='webstream'&&compression!=='gzip')returnfalse;
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returntrue;
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},
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});
29+
30+
functionmain({ api, compression, filesize, n }){
31+
// Create the fixture file with repeating lowercase ASCII
32+
constchunk=Buffer.alloc(Math.min(filesize,64*1024),'abcdefghij');
33+
constfd=fs.openSync(filename,'w');
34+
letremaining=filesize;
35+
while(remaining>0){
36+
consttoWrite=Math.min(remaining,chunk.length);
37+
fs.writeSync(fd,chunk,0,toWrite);
38+
remaining-=toWrite;
39+
}
40+
fs.closeSync(fd);
41+
42+
if(api==='classic'){
43+
benchClassic(n,filesize).then(()=>cleanup());
44+
}elseif(api==='webstream'){
45+
benchWebStream(n,filesize).then(()=>cleanup());
46+
}else{
47+
benchPull(n,filesize,compression).then(()=>cleanup());
48+
}
49+
}
50+
51+
functioncleanup(){
52+
try{fs.unlinkSync(filename);}catch{/* ignore */}
53+
}
54+
55+
// Stateless uppercase transform (shared by all paths)
56+
functionuppercaseChunk(chunk){
57+
constbuf=Buffer.allocUnsafe(chunk.length);
58+
for(leti=0;i<chunk.length;i++){
59+
constb=chunk[i];
60+
buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
61+
}
62+
returnbuf;
63+
}
64+
65+
// ---------------------------------------------------------------------------
66+
// Classic streams path: createReadStream -> Transform (upper) -> createGzip
67+
// ---------------------------------------------------------------------------
68+
asyncfunctionbenchClassic(n,filesize){
69+
awaitrunClassic();
70+
71+
bench.start();
72+
lettotalBytes=0;
73+
for(leti=0;i<n;i++){
74+
totalBytes+=awaitrunClassic();
75+
}
76+
bench.end(totalBytes/(1024*1024));
77+
}
78+
79+
functionrunClassic(){
80+
returnnewPromise((resolve,reject)=>{
81+
constrs=fs.createReadStream(filename);
82+
83+
constupper=newTransform({
84+
transform(chunk,encoding,callback){
85+
callback(null,uppercaseChunk(chunk));
86+
},
87+
});
88+
89+
constgz=zlib.createGzip();
90+
91+
lettotalBytes=0;
92+
constsink=newWritable({
93+
write(chunk,encoding,callback){
94+
totalBytes+=chunk.length;
95+
callback();
96+
},
97+
});
98+
99+
pipeline(rs,upper,gz,sink,(err)=>{
100+
if(err)reject(err);
101+
elseresolve(totalBytes);
102+
});
103+
});
104+
}
105+
106+
// ---------------------------------------------------------------------------
107+
// WebStream path: readableWebStream -> TransformStream (upper) -> CompressionStream
108+
// ---------------------------------------------------------------------------
109+
asyncfunctionbenchWebStream(n,filesize){
110+
awaitrunWebStream();
111+
112+
bench.start();
113+
lettotalBytes=0;
114+
for(leti=0;i<n;i++){
115+
totalBytes+=awaitrunWebStream();
116+
}
117+
bench.end(totalBytes/(1024*1024));
118+
}
119+
120+
asyncfunctionrunWebStream(){
121+
constfh=awaitfs.promises.open(filename,'r');
122+
try{
123+
constrs=fh.readableWebStream();
124+
125+
constupper=newTransformStream({
126+
transform(chunk,controller){
127+
constbuf=newUint8Array(chunk.length);
128+
for(leti=0;i<chunk.length;i++){
129+
constb=chunk[i];
130+
buf[i]=(b>=0x61&&b<=0x7a) ? b-0x20 : b;
131+
}
132+
controller.enqueue(buf);
133+
},
134+
});
135+
136+
constcompress=newCompressionStream('gzip');
137+
constoutput=rs.pipeThrough(upper).pipeThrough(compress);
138+
constreader=output.getReader();
139+
140+
lettotalBytes=0;
141+
while(true){
142+
const{ done, value }=awaitreader.read();
143+
if(done)break;
144+
totalBytes+=value.byteLength;
145+
}
146+
returntotalBytes;
147+
}finally{
148+
awaitfh.close();
149+
}
150+
}
151+
152+
// ---------------------------------------------------------------------------
153+
// Pull/iter path: pull() with uppercase transform + selected compression
154+
// ---------------------------------------------------------------------------
155+
asyncfunctionbenchPull(n,filesize,compression){
156+
constiter=require('zlib/iter');
157+
158+
constcompressFactory={
159+
gzip: iter.compressGzip,
160+
deflate: iter.compressDeflate,
161+
brotli: iter.compressBrotli,
162+
zstd: iter.compressZstd,
163+
}[compression];
164+
165+
// Warm up
166+
awaitrunPull(compressFactory);
167+
168+
bench.start();
169+
lettotalBytes=0;
170+
for(leti=0;i<n;i++){
171+
totalBytes+=awaitrunPull(compressFactory);
172+
}
173+
bench.end(totalBytes/(1024*1024));
174+
}
175+
176+
asyncfunctionrunPull(compressFactory){
177+
constfh=awaitfs.promises.open(filename,'r');
178+
try{
179+
// Stateless transform: uppercase each chunk in the batch
180+
constupper=(chunks)=>{
181+
if(chunks===null)returnnull;
182+
constout=newArray(chunks.length);
183+
for(letj=0;j<chunks.length;j++){
184+
out[j]=uppercaseChunk(chunks[j]);
185+
}
186+
returnout;
187+
};
188+
189+
constreadable=fh.pull(upper,compressFactory());
190+
191+
lettotalBytes=0;
192+
forawait(constchunksofreadable){
193+
for(leti=0;i<chunks.length;i++){
194+
totalBytes+=chunks[i].byteLength;
195+
}
196+
}
197+
returntotalBytes;
198+
}finally{
199+
awaitfh.close();
200+
}
201+
}
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