benchmark: update manywrites back pressure

ronag · targos · commit 13337985f7ef · 2020-01-14T08:30:35.000+01:00
Make manywrites benchmark a bit more realistic by taking back pressure into account. Otherwise memory usage would no correspond well with real world usage. PR-URL: #30977 Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com>
diff --git a/benchmark/streams/writable-manywrites.js b/benchmark/streams/writable-manywrites.js
@@ -20,8 +20,13 @@ function main({ n, sync }) {
 };
 
 bench.start();
- for (var k = 0; k < n; ++k) {
- s.write(b);
+
+ let k = 0;
+ function run() {
+ while (k++ < n && s.write(b));
+ if (k >= n)
+ bench.end(n);
 }
- bench.end(n);
+ s.on('drain', run);
+ run();
 }

-Original file line number
+Diff line change
 };
 bench.start();
 -for(vark=0;k<n;++k){
 -s.write(b);
++
 +letk=0;
 +functionrun(){
 +while(k++<n&&s.write(b));
 +if(k>=n)
 +bench.end(n);
+}
 -bench.end(n);
 +s.on('drain',run);
 +run();
+}