Who contributed to Node.js on July 14, 2026?

10 developers shipped this update, including GiHoon1123, Ram, Scott Taylor, GitHub Actions, Matteo Collina, nodejs-github-bot, joyeecheung, and nabsei, and 2 more.

What were the notable Node.js updates?

fix(h2): allow stream-bodied requests to multiplex on a busy session, fix(redirect): remove body headers after POST-to-GET (#5551), and fix(h2): destroy aborted stream synchronously instead of via setImmediate (#5559).

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The Wire · Showcase

UNDICI FIXES H2 MULTIPLEXING BOTTLENECK, NODE EVENTS LAYER CUTS MEMORY BLOAT

By RepoJournal · Filed 06:56 UTC on July 14, 2026 · About Node.js

10 people shipped this

Matteo Collina @mcollina 2 cited

GiHoon1123 @GiHoon1123 1 cited

Ram @Ram-blip 1 cited

Scott Taylor @staylor 1 cited

nodejs-github-bot @nodejs-github-bot 1 cited

joyeecheung @joyeecheung 1 cited

github-actions[bot] @github-actions[bot] 1 cited

GitHub Actions @web-flow

nabsei @nabsei

bmuenzenmeyer @bmuenzenmeyer

Undici's HTTP/2 client can finally multiplex stream-bodied requests without waiting for other in-flight traffic to drain, fixing a critical performance regression that forced sequential request handling.

The fix [1] removes the artificial serialization that deferred any request with a stream, async-iterable, or FormData body until every other request on the H2 session completed. If one of those in-flight requests is long-lived (like a streaming download), downstream requests got stuck in queue. This lands alongside two companion fixes: synchronous stream destruction on abort [3] instead of deferred cleanup, and proper header removal on POST-to-GET redirects [2]. On the Node.js core side, the events layer got aggressive optimization [5] that cuts memory growth when event names are unstructured or frequently removed [4]. The EventEmitter hot path gains 25% throughput on once(), 12-22% on add-remove operations, and 7-15% on listen-unique workloads. Matteo Collina landed these alongside libffi 3.7.1 [6] and new conditional probe support in the inspector [7]. Doc-kit shipped 1.4.2 [8] with formalized changesets-driven releases.

Action items

→ Upgrade undici if you stream request bodies over HTTP/2; this restores concurrent multiplexing nodejs/undici [plan]
→ Update Node.js core when available; EventEmitter optimization benefits all long-lived processes nodejs/node [monitor]

References

[1] fix(h2): allow stream-bodied requests to multiplex on a busy session ↗ nodejs/undici
[2] fix(redirect): remove body headers after POST-to-GET (#5551) nodejs/undici
[3] fix(h2): destroy aborted stream synchronously instead of via setImmediate (#5559) nodejs/undici
[4] events: avoid retaining removed event names nodejs/node
[5] events: optimize once() and removeListener() ↗ nodejs/node
[6] deps: update libffi to 3.7.1 ↗ nodejs/node
[7] inspector: add --cond to node inspect probe mode ↗ nodejs/node
[8] v1.4.2 ↗ nodejs/doc-kit

Quick answers

What shipped in Node.js on July 14, 2026?: Undici's HTTP/2 client can finally multiplex stream-bodied requests without waiting for other in-flight traffic to drain, fixing a critical performance regression that forced sequential request handling. In total, 22 commits, 21 pull requests, and 1 releases landed.
Who contributed to Node.js on July 14, 2026?: 10 developers shipped this update, including GiHoon1123, Ram, Scott Taylor, GitHub Actions, Matteo Collina, nodejs-github-bot, joyeecheung, and nabsei, and 2 more.
What were the notable Node.js updates?: fix(h2): allow stream-bodied requests to multiplex on a busy session, fix(redirect): remove body headers after POST-to-GET (#5551), and fix(h2): destroy aborted stream synchronously instead of via setImmediate (#5559).

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