quic: add support for TLS certificate compression - #64434

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bjohansebas:quic-cert-compression
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quic: add support for TLS certificate compression#64434
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Add an opt-in certificateCompression TLS option for QUIC sessions,
mirroring the existing node:tls support. When set to a list of
'zlib', 'brotli', and/or 'zstd', the server compresses its certificate
chain and the client advertises the algorithms it accepts, reducing the
size of the server's first flight and helping it stay within QUIC's
anti-amplification limit.

Certificate compression is disabled by default: the OpenSSL default
preferences are cleared unless the option is provided, keeping QUIC
consistent with node:tls

I've been using AI for the investigation and to better understand the context

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@nodejs-github-botnodejs-github-bot added c++ Issues and PRs that require attention from people who are familiar with C++. lib / src Issues and PRs involving general changes in the lib/ or src/ directories. needs-ci PRs that need a full CI run. labels Jul 12, 2026
@bjohansebas
bjohansebas marked this pull request as ready for review July 12, 2026 01:57
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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.23%. Comparing base (8a3b11c) to head (51cd687).
⚠️ Report is 47 commits behind head on main.

Additional details and impacted files
@@ Coverage Diff @@## main #64434 +/- ##
==========================================
- Coverage 90.24% 90.23% -0.02% 
==========================================
Files 741 741 Lines 241384 241646 +262 Branches 45480 45528 +48 ==========================================
+ Hits 217844 218038 +194 - Misses 15097 15155 +58 - Partials 8443 8453 +10
Files with missing linesCoverage Δ
lib/internal/quic/quic.js100.00% <100.00%> (ø)

... and 51 files with indirect coverage changes

🚀 New features to boost your workflow:
  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
  • 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

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Appears to be some linting issues but otherwise LGTM

@bjohansebas
bjohansebasforce-pushed the quic-cert-compression branch from 16493b9 to 4d98228CompareJuly 12, 2026 17:34
@bjohansebas
quic: add support for TLS certificate compression
51cd687
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
@bjohansebas
bjohansebasforce-pushed the quic-cert-compression branch from 4d98228 to 51cd687CompareJuly 12, 2026 17:52
@pimterrypimterry added commit-queue PRs queued for automated landing through the Commit Queue. request-ci Add this label to start a Jenkins CI on a PR. and removed commit-queue PRs queued for automated landing through the Commit Queue. labels Jul 13, 2026
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CI: https://ci.nodejs.org/job/node-test-pull-request/74779/

@bjohansebasbjohansebas added commit-queue PRs queued for automated landing through the Commit Queue. author ready PRs with CI started, the required approvals, and no outstanding review comments. labels Jul 16, 2026
@nodejs-github-botnodejs-github-bot removed the commit-queue PRs queued for automated landing through the Commit Queue. label Jul 16, 2026
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aduh95 pushed a commit that referenced this pull request Jul 21, 2026
@bjohansebas@aduh95
quic: add support for TLS certificate compression
eec5e69
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
@github-actionsgithub-actionsBot mentioned this pull request Jul 21, 2026
Merged
aduh95 pushed a commit that referenced this pull request Jul 21, 2026
@bjohansebas@aduh95
quic: add support for TLS certificate compression
ffa1a26
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
RafaelGSS pushed a commit that referenced this pull request Jul 29, 2026
@bjohansebas@RafaelGSS
quic: add support for TLS certificate compression
591090c
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
aduh95 pushed a commit that referenced this pull request Aug 6, 2026
@bjohansebas@aduh95
quic: add support for TLS certificate compression
50e639b
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
@github-actionsgithub-actionsBot mentioned this pull request Aug 21, 2026
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})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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quic: add support for TLS certificate compression - #64434
Merged
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bjohansebas:quic-cert-compression
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Merged
quic: add support for TLS certificate compression#64434
nodejs-github-bot merged 1 commit into
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Add an opt-in certificateCompression TLS option for QUIC sessions,

mirroring the existing node:tls support. When set to a list of

'zlib', 'brotli', and/or 'zstd', the server compresses its certificate

chain and the client advertises the algorithms it accepts, reducing the

size of the server's first flight and helping it stay within QUIC's

anti-amplification limit.
Certificate compression is disabled by default: the OpenSSL default

preferences are cleared unless the option is provided, keeping QUIC

consistent with node:tls
I've been using AI for the investigation and to better understand the context
@nodejs-github-bot
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Jul 12, 2026

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  •  @nodejs/quic
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Codecov Report
✅ All modified and coverable lines are covered by tests.

✅ Project coverage is 90.23%. Comparing base (8a3b11c) to head (51cd687).
⚠️ Report is 47 commits behind head on main.
Additional details and impacted files
@@ Coverage Diff @@## main #64434 +/- ##
==========================================
- Coverage 90.24% 90.23% -0.02% 
==========================================
Files 741 741 Lines 241384 241646 +262 Branches 45480 45528 +48 ==========================================
+ Hits 217844 218038 +194 - Misses 15097 15155 +58 - Partials 8443 8453 +10 
Files with missing linesCoverage Δ
lib/internal/quic/quic.js100.00% <100.00%> (ø)
... and 51 files with indirect coverage changes
 🚀 New features to boost your workflow: 
  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
  • 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.
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Appears to be some linting issues but otherwise LGTM
@bjohansebas
bjohansebasforce-pushed
the
quic-cert-compression
branch
from
16493b9 to
4d98228CompareJuly 12, 2026 17:34
@bjohansebas
quic: add support for TLS certificate compression
51cd687
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
@bjohansebas
bjohansebasforce-pushed
the
quic-cert-compression
branch
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@nodejs-github-bot
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aduh95 pushed a commit
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Jul 21, 2026
@bjohansebas@aduh95
quic: add support for TLS certificate compression
eec5e69
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
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 Merged

aduh95 pushed a commit
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Jul 21, 2026
@bjohansebas@aduh95
quic: add support for TLS certificate compression
ffa1a26
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
RafaelGSS pushed a commit
that referenced
this pull request
Jul 29, 2026
@bjohansebas@RafaelGSS
quic: add support for TLS certificate compression
591090c
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
aduh95 pushed a commit
that referenced
this pull request
Aug 6, 2026
@bjohansebas@aduh95
quic: add support for TLS certificate compression
50e639b
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
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mentioned this pull request
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, '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");
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})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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quic: add support for TLS certificate compression - #64434
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quic: add support for TLS certificate compression#64434
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Add an opt-in certificateCompression TLS option for QUIC sessions,

mirroring the existing node:tls support. When set to a list of

'zlib', 'brotli', and/or 'zstd', the server compresses its certificate

chain and the client advertises the algorithms it accepts, reducing the

size of the server's first flight and helping it stay within QUIC's

anti-amplification limit.
Certificate compression is disabled by default: the OpenSSL default

preferences are cleared unless the option is provided, keeping QUIC

consistent with node:tls
I've been using AI for the investigation and to better understand the context
@nodejs-github-bot
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Codecov Report
✅ All modified and coverable lines are covered by tests.

✅ Project coverage is 90.23%. Comparing base (8a3b11c) to head (51cd687).
⚠️ Report is 47 commits behind head on main.
Additional details and impacted files
@@ Coverage Diff @@## main #64434 +/- ##
==========================================
- Coverage 90.24% 90.23% -0.02% 
==========================================
Files 741 741 Lines 241384 241646 +262 Branches 45480 45528 +48 ==========================================
+ Hits 217844 218038 +194 - Misses 15097 15155 +58 - Partials 8443 8453 +10 
Files with missing linesCoverage Δ
lib/internal/quic/quic.js100.00% <100.00%> (ø)
... and 51 files with indirect coverage changes
 🚀 New features to boost your workflow: 
  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
  • 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.
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Appears to be some linting issues but otherwise LGTM
@bjohansebas
bjohansebasforce-pushed
the
quic-cert-compression
branch
from
16493b9 to
4d98228CompareJuly 12, 2026 17:34
@bjohansebas
quic: add support for TLS certificate compression
51cd687
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
@bjohansebas
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@bjohansebas@aduh95
quic: add support for TLS certificate compression
eec5e69
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
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aduh95 pushed a commit
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@bjohansebas@aduh95
quic: add support for TLS certificate compression
ffa1a26
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
RafaelGSS pushed a commit
that referenced
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Jul 29, 2026
@bjohansebas@RafaelGSS
quic: add support for TLS certificate compression
591090c
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
aduh95 pushed a commit
that referenced
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Aug 6, 2026
@bjohansebas@aduh95
quic: add support for TLS certificate compression
50e639b
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
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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");
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})();
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try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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quic: add support for TLS certificate compression - #64434
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Add an opt-in certificateCompression TLS option for QUIC sessions,

mirroring the existing node:tls support. When set to a list of

'zlib', 'brotli', and/or 'zstd', the server compresses its certificate

chain and the client advertises the algorithms it accepts, reducing the

size of the server's first flight and helping it stay within QUIC's

anti-amplification limit.
Certificate compression is disabled by default: the OpenSSL default

preferences are cleared unless the option is provided, keeping QUIC

consistent with node:tls
I've been using AI for the investigation and to better understand the context
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Codecov Report
✅ All modified and coverable lines are covered by tests.

✅ Project coverage is 90.23%. Comparing base (8a3b11c) to head (51cd687).
⚠️ Report is 47 commits behind head on main.
Additional details and impacted files
@@ Coverage Diff @@## main #64434 +/- ##
==========================================
- Coverage 90.24% 90.23% -0.02% 
==========================================
Files 741 741 Lines 241384 241646 +262 Branches 45480 45528 +48 ==========================================
+ Hits 217844 218038 +194 - Misses 15097 15155 +58 - Partials 8443 8453 +10 
Files with missing linesCoverage Δ
lib/internal/quic/quic.js100.00% <100.00%> (ø)
... and 51 files with indirect coverage changes
 🚀 New features to boost your workflow: 
  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
  • 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.
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Appears to be some linting issues but otherwise LGTM
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quic: add support for TLS certificate compression
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quic: add support for TLS certificate compression
eec5e69
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
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@bjohansebas@aduh95
quic: add support for TLS certificate compression
ffa1a26
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
RafaelGSS pushed a commit
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Jul 29, 2026
@bjohansebas@RafaelGSS
quic: add support for TLS certificate compression
591090c
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
aduh95 pushed a commit
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Aug 6, 2026
@bjohansebas@aduh95
quic: add support for TLS certificate compression
50e639b
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
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, '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
quic: add support for TLS certificate compression - #64434
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quic: add support for TLS certificate compression#64434
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Add an opt-in certificateCompression TLS option for QUIC sessions,

mirroring the existing node:tls support. When set to a list of

'zlib', 'brotli', and/or 'zstd', the server compresses its certificate

chain and the client advertises the algorithms it accepts, reducing the

size of the server's first flight and helping it stay within QUIC's

anti-amplification limit.
Certificate compression is disabled by default: the OpenSSL default

preferences are cleared unless the option is provided, keeping QUIC

consistent with node:tls
I've been using AI for the investigation and to better understand the context
@nodejs-github-bot
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Jul 12, 2026

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  •  @nodejs/quic
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@bjohansebas
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Codecov Report
✅ All modified and coverable lines are covered by tests.

✅ Project coverage is 90.23%. Comparing base (8a3b11c) to head (51cd687).
⚠️ Report is 47 commits behind head on main.
Additional details and impacted files
@@ Coverage Diff @@## main #64434 +/- ##
==========================================
- Coverage 90.24% 90.23% -0.02% 
==========================================
Files 741 741 Lines 241384 241646 +262 Branches 45480 45528 +48 ==========================================
+ Hits 217844 218038 +194 - Misses 15097 15155 +58 - Partials 8443 8453 +10 
Files with missing linesCoverage Δ
lib/internal/quic/quic.js100.00% <100.00%> (ø)
... and 51 files with indirect coverage changes
 🚀 New features to boost your workflow: 
  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
  • 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.
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Appears to be some linting issues but otherwise LGTM
@bjohansebas
bjohansebasforce-pushed
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quic-cert-compression
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4d98228CompareJuly 12, 2026 17:34
@bjohansebas
quic: add support for TLS certificate compression
51cd687
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
@bjohansebas
bjohansebasforce-pushed
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aduh95 pushed a commit
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@bjohansebas@aduh95
quic: add support for TLS certificate compression
eec5e69
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
@github-actionsgithub-actionsBot
mentioned this pull request
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 Merged

aduh95 pushed a commit
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Jul 21, 2026
@bjohansebas@aduh95
quic: add support for TLS certificate compression
ffa1a26
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
RafaelGSS pushed a commit
that referenced
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Jul 29, 2026
@bjohansebas@RafaelGSS
quic: add support for TLS certificate compression
591090c
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
aduh95 pushed a commit
that referenced
this pull request
Aug 6, 2026
@bjohansebas@aduh95
quic: add support for TLS certificate compression
50e639b
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
@github-actionsgithub-actionsBot
mentioned this pull request
Aug 21, 2026
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, '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
quic: add support for TLS certificate compression - #64434
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Merged
quic: add support for TLS certificate compression#64434
nodejs-github-bot merged 1 commit into
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Add an opt-in certificateCompression TLS option for QUIC sessions,

mirroring the existing node:tls support. When set to a list of

'zlib', 'brotli', and/or 'zstd', the server compresses its certificate

chain and the client advertises the algorithms it accepts, reducing the

size of the server's first flight and helping it stay within QUIC's

anti-amplification limit.
Certificate compression is disabled by default: the OpenSSL default

preferences are cleared unless the option is provided, keeping QUIC

consistent with node:tls
I've been using AI for the investigation and to better understand the context
@nodejs-github-bot
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marked this pull request as ready for review
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Codecov Report
✅ All modified and coverable lines are covered by tests.

✅ Project coverage is 90.23%. Comparing base (8a3b11c) to head (51cd687).
⚠️ Report is 47 commits behind head on main.
Additional details and impacted files
@@ Coverage Diff @@## main #64434 +/- ##
==========================================
- Coverage 90.24% 90.23% -0.02% 
==========================================
Files 741 741 Lines 241384 241646 +262 Branches 45480 45528 +48 ==========================================
+ Hits 217844 218038 +194 - Misses 15097 15155 +58 - Partials 8443 8453 +10 
Files with missing linesCoverage Δ
lib/internal/quic/quic.js100.00% <100.00%> (ø)
... and 51 files with indirect coverage changes
 🚀 New features to boost your workflow: 
  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
  • 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.
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Appears to be some linting issues but otherwise LGTM
@bjohansebas
bjohansebasforce-pushed
the
quic-cert-compression
branch
from
16493b9 to
4d98228CompareJuly 12, 2026 17:34
@bjohansebas
quic: add support for TLS certificate compression
51cd687
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
@bjohansebas
bjohansebasforce-pushed
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quic-cert-compression
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aduh95 pushed a commit
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Jul 21, 2026
@bjohansebas@aduh95
quic: add support for TLS certificate compression
eec5e69
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
@github-actionsgithub-actionsBot
mentioned this pull request
Jul 21, 2026
 Merged

aduh95 pushed a commit
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Jul 21, 2026
@bjohansebas@aduh95
quic: add support for TLS certificate compression
ffa1a26
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
RafaelGSS pushed a commit
that referenced
this pull request
Jul 29, 2026
@bjohansebas@RafaelGSS
quic: add support for TLS certificate compression
591090c
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
aduh95 pushed a commit
that referenced
this pull request
Aug 6, 2026
@bjohansebas@aduh95
quic: add support for TLS certificate compression
50e639b
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
@github-actionsgithub-actionsBot
mentioned this pull request
Aug 21, 2026
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
quic: add support for TLS certificate compression - #64434
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nodejs-github-bot merged 1 commit into
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bjohansebas:quic-cert-compression
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Merged
quic: add support for TLS certificate compression#64434
nodejs-github-bot merged 1 commit into
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bjohansebas:quic-cert-compression
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@bjohansebas
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Jul 12, 2026

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Add an opt-in certificateCompression TLS option for QUIC sessions,

mirroring the existing node:tls support. When set to a list of

'zlib', 'brotli', and/or 'zstd', the server compresses its certificate

chain and the client advertises the algorithms it accepts, reducing the

size of the server's first flight and helping it stay within QUIC's

anti-amplification limit.
Certificate compression is disabled by default: the OpenSSL default

preferences are cleared unless the option is provided, keeping QUIC

consistent with node:tls
I've been using AI for the investigation and to better understand the context
@nodejs-github-bot
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Jul 12, 2026

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  •  @nodejs/quic
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@@ Coverage Diff @@## main #64434 +/- ##
==========================================
- Coverage 90.24% 90.23% -0.02% 
==========================================
Files 741 741 Lines 241384 241646 +262 Branches 45480 45528 +48 ==========================================
+ Hits 217844 218038 +194 - Misses 15097 15155 +58 - Partials 8443 8453 +10 
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Appears to be some linting issues but otherwise LGTM
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quic: add support for TLS certificate compression
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Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
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quic: add support for TLS certificate compression
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Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
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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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quic: add support for TLS certificate compression - #64434
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Add an opt-in certificateCompression TLS option for QUIC sessions,

mirroring the existing node:tls support. When set to a list of

'zlib', 'brotli', and/or 'zstd', the server compresses its certificate

chain and the client advertises the algorithms it accepts, reducing the

size of the server's first flight and helping it stay within QUIC's

anti-amplification limit.
Certificate compression is disabled by default: the OpenSSL default

preferences are cleared unless the option is provided, keeping QUIC

consistent with node:tls
I've been using AI for the investigation and to better understand the context
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Codecov Report
✅ All modified and coverable lines are covered by tests.

✅ Project coverage is 90.23%. Comparing base (8a3b11c) to head (51cd687).
⚠️ Report is 47 commits behind head on main.
Additional details and impacted files
@@ Coverage Diff @@## main #64434 +/- ##
==========================================
- Coverage 90.24% 90.23% -0.02% 
==========================================
Files 741 741 Lines 241384 241646 +262 Branches 45480 45528 +48 ==========================================
+ Hits 217844 218038 +194 - Misses 15097 15155 +58 - Partials 8443 8453 +10 
Files with missing linesCoverage Δ
lib/internal/quic/quic.js100.00% <100.00%> (ø)
... and 51 files with indirect coverage changes
 🚀 New features to boost your workflow: 
  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
  • 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.
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Appears to be some linting issues but otherwise LGTM
@bjohansebas
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quic: add support for TLS certificate compression
eec5e69
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
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@bjohansebas@aduh95
quic: add support for TLS certificate compression
ffa1a26
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
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@bjohansebas@RafaelGSS
quic: add support for TLS certificate compression
591090c
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
aduh95 pushed a commit
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Aug 6, 2026
@bjohansebas@aduh95
quic: add support for TLS certificate compression
50e639b
Signed-off-by: Sebastian Beltran <bjohansebas@gmail.com>
PR-URL: #64434
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
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