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http: reduce parts in chunked response when corking #50167
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Review requested:
|
@nodejs/performance @nodejs/http |
The
notable-change
Please suggest a text for the release notes if you'd like to include a more detailed summary, then proceed to update the PR description with the text or a link to the notable change suggested text comment. |
@RafaelGSS maybe too tight with v21 but I think this is quite a notable change that can have impact. |
@nodejs/http |
Can you please include benchmark code and results? |
@rluvaton are you blocking on that? |
No, because of the tight release time but would appreciate in a different pr |
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lgtm
Commit Queue failed- Loading data for nodejs/node/pull/50167 ✔ Done loading data for nodejs/node/pull/50167 ----------------------------------- PR info ------------------------------------ Title http: reduce parts in chunked response when corking (#50167) Author Robert Nagy (@ronag) Branch ronag:batch-chunked -> nodejs:main Labels http, semver-major, notable-change, author ready, needs-ci, review wanted, needs-benchmark-ci, commit-queue-squash Commits 4 - http: reduce parts in chunked response when corking - fixup - Update _http_outgoing.js - Update _http_outgoing.js Committers 2 - Robert Nagy - GitHub PR-URL: https://github.com/nodejs/node/pull/50167 Refs: https://github.com/nodejs/performance/issues/57 Reviewed-By: Stephen Belanger Reviewed-By: Matteo Collina ------------------------------ Generated metadata ------------------------------ PR-URL: https://github.com/nodejs/node/pull/50167 Refs: https://github.com/nodejs/performance/issues/57 Reviewed-By: Stephen Belanger Reviewed-By: Matteo Collina -------------------------------------------------------------------------------- ℹ This PR was created on Thu, 12 Oct 2023 20:35:42 GMT ✔ Approvals: 2 ✔ - Stephen Belanger (@Qard): https://github.com/nodejs/node/pull/50167#pullrequestreview-1676981875 ✔ - Matteo Collina (@mcollina) (TSC): https://github.com/nodejs/node/pull/50167#pullrequestreview-1678717255 ✘ semver-major requires at least 2 TSC approvals ✔ Last GitHub CI successful ℹ Last Full PR CI on 2023-10-14T11:56:46Z: https://ci.nodejs.org/job/node-test-pull-request/54775/ ℹ Last CITGM CI on 2023-10-15T06:14:29Z: https://ci.nodejs.org/view/Node.js-citgm/job/citgm-smoker/3329/ - Querying data for job/node-test-pull-request/3329/ ✔ Last Jenkins CI successful -------------------------------------------------------------------------------- ✔ Aborted `git node land` session in /home/runner/work/node/node/.ncuhttps://github.com/nodejs/node/actions/runs/6522888569 |
@Trott Can you help landing this? |
@nodejs/tsc needs another approval. The semver major is because it might break clients that make incorrect assumptions about the chunking of responses. |
Landed in d68d0ea |
@ronag can you update the PR to include a description for the blog post? Something easy for users, thank you! |
Notable Changes: doc: * promote fetch/webstreams from experimental to stable (Steven) #45684 esm: * use import attributes instead of import assertions (Antoine du Hamel) #50140 * --experimental-default-type flag to flip module defaults (Geoffrey Booth) #49869 * remove `globalPreload` hook (superseded by `initialize`) (Jacob Smith) #49144 fs: * add flush option to writeFile() functions (Colin Ihrig) #50009 * (SEMVER-MAJOR) add globSync implementation (Moshe Atlow) #47653 http: * (SEMVER-MAJOR) reduce parts in chunked response when corking (Robert Nagy) #50167 lib: * (SEMVER-MINOR) add WebSocket client (Matthew Aitken) #49830 stream: * optimize Writable (Robert Nagy) #50012 test_runner: * (SEMVER-MAJOR) support passing globs (Moshe Atlow) #47653 vm: * use default HDO when importModuleDynamically is not set (Joyee Cheung) #49950 Semver-Major Commits: * (SEMVER-MAJOR) reset embedder string to "-node.0" (Michaël Zasso) #49639 * (SEMVER-MAJOR) drop support for Visual Studio 2019 (Michaël Zasso) #49051 * (SEMVER-MAJOR) bump supported macOS and Xcode versions (Michaël Zasso) #49164 * (SEMVER-MAJOR) do not overwrite _writableState.defaultEncoding (Tobias Nießen) #49140 * (SEMVER-MAJOR) bump minimum ICU version to 73 (Michaël Zasso) #49639 * (SEMVER-MAJOR) V8: cherry-pick 8ec2651fbdd8 (Michaël Zasso) #49639 * (SEMVER-MAJOR) V8: cherry-pick 89b3702c92b0 (Michaël Zasso) #49639 * (SEMVER-MAJOR) V8: cherry-pick de9a5de2274f (Michaël Zasso) #49639 * (SEMVER-MAJOR) V8: cherry-pick b5b5d6c31bb0 (Michaël Zasso) #49639 * (SEMVER-MAJOR) V8: cherry-pick 93b1a74cbc9b (Michaël Zasso) #49639 * (SEMVER-MAJOR) V8: cherry-pick 1a3ecc2483b2 (Michaël Zasso) #49639 * (SEMVER-MAJOR) patch V8 to avoid duplicated zlib symbol (Michaël Zasso) #49639 * (SEMVER-MAJOR) remove usage of a C++20 feature from V8 (Michaël Zasso) #49639 * (SEMVER-MAJOR) avoid compilation error with ASan (Michaël Zasso) #49639 * (SEMVER-MAJOR) disable V8 concurrent sparkplug compilation (Michaël Zasso) #49639 * (SEMVER-MAJOR) silence irrelevant V8 warning (Michaël Zasso) #49639 * (SEMVER-MAJOR) always define V8_EXPORT_PRIVATE as no-op (Michaël Zasso) #49639 * (SEMVER-MAJOR) update V8 to 11.8.172.13 (Michaël Zasso) #49639 * (SEMVER-MAJOR) update llhttp to 9.1.2 (Paolo Insogna) #48981 * (SEMVER-MAJOR) validate options of `on` and `once` (Deokjin Kim) #46018 * (SEMVER-MAJOR) adjust `position` validation in reading methods (Livia Medeiros) #42835 * (SEMVER-MAJOR) add globSync implementation (Moshe Atlow) #47653 * (SEMVER-MAJOR) reduce parts in chunked response when corking (Robert Nagy) #50167 * (SEMVER-MAJOR) update usage of always on Atomics API (Michaël Zasso) #49639 * (SEMVER-MAJOR) mark URL/URLSearchParams as uncloneable and untransferable (Chengzhong Wu) #47497 * (SEMVER-MAJOR) remove aix directory case for package reader (Yagiz Nizipli) #48605 * (SEMVER-MAJOR) add `navigator.hardwareConcurrency` (Yagiz Nizipli) #47769 * (SEMVER-MAJOR) runtime deprecate punycode (Yagiz Nizipli) #47202 * (SEMVER-MAJOR) harmonize error code between ESM and CJS (Antoine du Hamel) #48606 * (SEMVER-MAJOR) do not treat `server.maxConnections=0` as `Infinity` (ignoramous) #48276 * (SEMVER-MAJOR) only defer _final call when connecting (Jason Zhang) #47385 * (SEMVER-MAJOR) rename internal NAPI_VERSION definition (Chengzhong Wu) #48501 * (SEMVER-MAJOR) update NODE_MODULE_VERSION to 120 (Michaël Zasso) #49639 * (SEMVER-MAJOR) throw DOMException on cloning non-serializable objects (Chengzhong Wu) #47839 * (SEMVER-MAJOR) throw DataCloneError on transfering untransferable objects (Chengzhong Wu) #47604 * (SEMVER-MAJOR) use private properties for strategies (Yagiz Nizipli) #47218 * (SEMVER-MAJOR) use private properties for encoding (Yagiz Nizipli) #47218 * (SEMVER-MAJOR) use private properties for compression (Yagiz Nizipli) #47218 * (SEMVER-MAJOR) skip v8-updates/test-linux-perf (Michaël Zasso) #49639 * (SEMVER-MAJOR) skip test-tick-processor-arguments on SmartOS (Michaël Zasso) #49639 * (SEMVER-MAJOR) adapt REPL test to V8 changes (Michaël Zasso) #49639 * (SEMVER-MAJOR) adapt test-fs-write to V8 internal changes (Michaël Zasso) #49639 * (SEMVER-MAJOR) update flag to disable SharedArrayBuffer (Michaël Zasso) #49639 * (SEMVER-MAJOR) adapt debugger tests to V8 11.4 (Philip Pfaffe) #49639 * (SEMVER-MAJOR) disallow array in `run` options (Raz Luvaton) #49935 * (SEMVER-MAJOR) support passing globs (Moshe Atlow) #47653 * (SEMVER-MAJOR) use `validateNumber` for `options.minDHSize` (Deokjin Kim) #49973 * (SEMVER-MAJOR) use validateFunction for `options.checkServerIdentity` (Deokjin Kim) #49896 * (SEMVER-MAJOR) add new V8 headers to distribution (Michaël Zasso) #49639 * (SEMVER-MAJOR) update V8 gypfiles for 11.8 (Michaël Zasso) #49639 * (SEMVER-MAJOR) update V8 gypfiles for 11.7 (Michaël Zasso) #49639 * (SEMVER-MAJOR) update V8 gypfiles for 11.6 (Michaël Zasso) #49639 * (SEMVER-MAJOR) update V8 gypfiles for 11.5 (Michaël Zasso) #49639 * (SEMVER-MAJOR) update V8 gypfiles for 11.4 (Michaël Zasso) #49639 * (SEMVER-MAJOR) runtime deprecate `promisify`-ing a function returning a `Promise` (Antoine du Hamel) #49609 * (SEMVER-MAJOR) freeze `dependencySpecifiers` array (Antoine du Hamel) #49720 PR-URL: #49870 Co-authored-by: Michaël Zasso <targos@protonmail.com>
@RafaelGSS I tried improving the description. |
Refs: nodejs/performance#57 PR-URL: nodejs#50167 Reviewed-By: Stephen Belanger <admin@stephenbelanger.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Notable Changes: doc: * promote fetch/webstreams from experimental to stable (Steven) #45684 esm: * use import attributes instead of import assertions (Antoine du Hamel) #50140 * --experimental-default-type flag to flip module defaults (Geoffrey Booth) #49869 * remove `globalPreload` hook (superseded by `initialize`) (Jacob Smith) #49144 fs: * add flush option to writeFile() functions (Colin Ihrig) #50009 * (SEMVER-MAJOR) add globSync implementation (Moshe Atlow) #47653 http: * (SEMVER-MAJOR) reduce parts in chunked response when corking (Robert Nagy) #50167 lib: * (SEMVER-MINOR) add WebSocket client (Matthew Aitken) #49830 * (SEMVER-MAJOR) add `navigator.hardwareConcurrency` (Yagiz Nizipli) #47769 stream: * optimize Writable (Robert Nagy) #50012 test_runner: * (SEMVER-MAJOR) support passing globs (Moshe Atlow) #47653 vm: * use default HDO when importModuleDynamically is not set (Joyee Cheung) #49950 Semver-Major Commits: * (SEMVER-MAJOR) build: drop support for Visual Studio 2019 (Michaël Zasso) #49051 * (SEMVER-MAJOR) build: bump supported macOS and Xcode versions (Michaël Zasso) #49164 * (SEMVER-MAJOR) crypto: do not overwrite \_writableState.defaultEncoding (Tobias Nießen) #49140 * (SEMVER-MAJOR) deps: bump minimum ICU version to 73 (Michaël Zasso) #49639 * (SEMVER-MAJOR) deps: update V8 to 11.8.172.13 (Michaël Zasso) #49639 * (SEMVER-MAJOR) deps: update llhttp to 9.1.2 (Paolo Insogna) #48981 * (SEMVER-MAJOR) events: validate options of `on` and `once` (Deokjin Kim) #46018 * (SEMVER-MAJOR) fs: adjust `position` validation in reading methods (Livia Medeiros) #42835 * (SEMVER-MAJOR) fs: add globSync implementation (Moshe Atlow) #47653 * (SEMVER-MAJOR) http: reduce parts in chunked response when corking (Robert Nagy) #50167 * (SEMVER-MAJOR) lib: mark URL/URLSearchParams as uncloneable and untransferable (Chengzhong Wu) #47497 * (SEMVER-MAJOR) lib: remove aix directory case for package reader (Yagiz Nizipli) #48605 * (SEMVER-MAJOR) lib: add `navigator.hardwareConcurrency` (Yagiz Nizipli) #47769 * (SEMVER-MAJOR) lib: runtime deprecate punycode (Yagiz Nizipli) #47202 * (SEMVER-MAJOR) module: harmonize error code between ESM and CJS (Antoine du Hamel) #48606 * (SEMVER-MAJOR) net: do not treat `server.maxConnections=0` as `Infinity` (ignoramous) #48276 * (SEMVER-MAJOR) net: only defer \_final call when connecting (Jason Zhang) #47385 * (SEMVER-MAJOR) node-api: rename internal NAPI\_VERSION definition (Chengzhong Wu) #48501 * (SEMVER-MAJOR) src: update NODE\_MODULE\_VERSION to 120 (Michaël Zasso) #49639 * (SEMVER-MAJOR) src: throw DOMException on cloning non-serializable objects (Chengzhong Wu) #47839 * (SEMVER-MAJOR) src: throw DataCloneError on transfering untransferable objects (Chengzhong Wu) #47604 * (SEMVER-MAJOR) stream: use private properties for strategies (Yagiz Nizipli) #47218 * (SEMVER-MAJOR) stream: use private properties for encoding (Yagiz Nizipli) #47218 * (SEMVER-MAJOR) stream: use private properties for compression (Yagiz Nizipli) #47218 * (SEMVER-MAJOR) test\_runner: disallow array in `run` options (Raz Luvaton) #49935 * (SEMVER-MAJOR) test\_runner: support passing globs (Moshe Atlow) #47653 * (SEMVER-MAJOR) tls: use `validateNumber` for `options.minDHSize` (Deokjin Kim) #49973 * (SEMVER-MAJOR) tls: use validateFunction for `options.checkServerIdentity` (Deokjin Kim) #49896 * (SEMVER-MAJOR) util: runtime deprecate `promisify`-ing a function returning a `Promise` (Antoine du Hamel) #49609 * (SEMVER-MAJOR) vm: freeze `dependencySpecifiers` array (Antoine du Hamel) #49720 PR-URL: #49870 Co-authored-by: Michaël Zasso <targos@protonmail.com>
Notable Changes: doc: * promote fetch/webstreams from experimental to stable (Steven) #45684 esm: * use import attributes instead of import assertions (Antoine du Hamel) #50140 * --experimental-default-type flag to flip module defaults (Geoffrey Booth) #49869 * remove `globalPreload` hook (superseded by `initialize`) (Jacob Smith) #49144 fs: * add flush option to writeFile() functions (Colin Ihrig) #50009 * (SEMVER-MAJOR) add globSync implementation (Moshe Atlow) #47653 http: * (SEMVER-MAJOR) reduce parts in chunked response when corking (Robert Nagy) #50167 lib: * (SEMVER-MINOR) add WebSocket client (Matthew Aitken) #49830 * (SEMVER-MAJOR) add `navigator.hardwareConcurrency` (Yagiz Nizipli) #47769 stream: * optimize Writable (Robert Nagy) #50012 test_runner: * (SEMVER-MAJOR) support passing globs (Moshe Atlow) #47653 vm: * use default HDO when importModuleDynamically is not set (Joyee Cheung) #49950 Semver-Major Commits: * (SEMVER-MAJOR) build: drop support for Visual Studio 2019 (Michaël Zasso) #49051 * (SEMVER-MAJOR) build: bump supported macOS and Xcode versions (Michaël Zasso) #49164 * (SEMVER-MAJOR) crypto: do not overwrite \_writableState.defaultEncoding (Tobias Nießen) #49140 * (SEMVER-MAJOR) deps: bump minimum ICU version to 73 (Michaël Zasso) #49639 * (SEMVER-MAJOR) deps: update V8 to 11.8.172.13 (Michaël Zasso) #49639 * (SEMVER-MAJOR) deps: update llhttp to 9.1.2 (Paolo Insogna) #48981 * (SEMVER-MAJOR) events: validate options of `on` and `once` (Deokjin Kim) #46018 * (SEMVER-MAJOR) fs: adjust `position` validation in reading methods (Livia Medeiros) #42835 * (SEMVER-MAJOR) fs: add globSync implementation (Moshe Atlow) #47653 * (SEMVER-MAJOR) http: reduce parts in chunked response when corking (Robert Nagy) #50167 * (SEMVER-MAJOR) lib: mark URL/URLSearchParams as uncloneable and untransferable (Chengzhong Wu) #47497 * (SEMVER-MAJOR) lib: remove aix directory case for package reader (Yagiz Nizipli) #48605 * (SEMVER-MAJOR) lib: add `navigator.hardwareConcurrency` (Yagiz Nizipli) #47769 * (SEMVER-MAJOR) lib: runtime deprecate punycode (Yagiz Nizipli) #47202 * (SEMVER-MAJOR) module: harmonize error code between ESM and CJS (Antoine du Hamel) #48606 * (SEMVER-MAJOR) net: do not treat `server.maxConnections=0` as `Infinity` (ignoramous) #48276 * (SEMVER-MAJOR) net: only defer \_final call when connecting (Jason Zhang) #47385 * (SEMVER-MAJOR) node-api: rename internal NAPI\_VERSION definition (Chengzhong Wu) #48501 * (SEMVER-MAJOR) src: update NODE\_MODULE\_VERSION to 120 (Michaël Zasso) #49639 * (SEMVER-MAJOR) src: throw DOMException on cloning non-serializable objects (Chengzhong Wu) #47839 * (SEMVER-MAJOR) src: throw DataCloneError on transfering untransferable objects (Chengzhong Wu) #47604 * (SEMVER-MAJOR) stream: use private properties for strategies (Yagiz Nizipli) #47218 * (SEMVER-MAJOR) stream: use private properties for encoding (Yagiz Nizipli) #47218 * (SEMVER-MAJOR) stream: use private properties for compression (Yagiz Nizipli) #47218 * (SEMVER-MAJOR) test\_runner: disallow array in `run` options (Raz Luvaton) #49935 * (SEMVER-MAJOR) test\_runner: support passing globs (Moshe Atlow) #47653 * (SEMVER-MAJOR) tls: use `validateNumber` for `options.minDHSize` (Deokjin Kim) #49973 * (SEMVER-MAJOR) tls: use validateFunction for `options.checkServerIdentity` (Deokjin Kim) #49896 * (SEMVER-MAJOR) util: runtime deprecate `promisify`-ing a function returning a `Promise` (Antoine du Hamel) #49609 * (SEMVER-MAJOR) vm: freeze `dependencySpecifiers` array (Antoine du Hamel) #49720 PR-URL: #49870 Co-authored-by: Michaël Zasso <targos@protonmail.com>
Refs: nodejs/performance#57 PR-URL: nodejs#50167 Reviewed-By: Stephen Belanger <admin@stephenbelanger.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Notable Changes: doc: * promote fetch/webstreams from experimental to stable (Steven) nodejs#45684 esm: * use import attributes instead of import assertions (Antoine du Hamel) nodejs#50140 * --experimental-default-type flag to flip module defaults (Geoffrey Booth) nodejs#49869 * remove `globalPreload` hook (superseded by `initialize`) (Jacob Smith) nodejs#49144 fs: * add flush option to writeFile() functions (Colin Ihrig) nodejs#50009 * (SEMVER-MAJOR) add globSync implementation (Moshe Atlow) nodejs#47653 http: * (SEMVER-MAJOR) reduce parts in chunked response when corking (Robert Nagy) nodejs#50167 lib: * (SEMVER-MINOR) add WebSocket client (Matthew Aitken) nodejs#49830 * (SEMVER-MAJOR) add `navigator.hardwareConcurrency` (Yagiz Nizipli) nodejs#47769 stream: * optimize Writable (Robert Nagy) nodejs#50012 test_runner: * (SEMVER-MAJOR) support passing globs (Moshe Atlow) nodejs#47653 vm: * use default HDO when importModuleDynamically is not set (Joyee Cheung) nodejs#49950 Semver-Major Commits: * (SEMVER-MAJOR) build: drop support for Visual Studio 2019 (Michaël Zasso) nodejs#49051 * (SEMVER-MAJOR) build: bump supported macOS and Xcode versions (Michaël Zasso) nodejs#49164 * (SEMVER-MAJOR) crypto: do not overwrite \_writableState.defaultEncoding (Tobias Nießen) nodejs#49140 * (SEMVER-MAJOR) deps: bump minimum ICU version to 73 (Michaël Zasso) nodejs#49639 * (SEMVER-MAJOR) deps: update V8 to 11.8.172.13 (Michaël Zasso) nodejs#49639 * (SEMVER-MAJOR) deps: update llhttp to 9.1.2 (Paolo Insogna) nodejs#48981 * (SEMVER-MAJOR) events: validate options of `on` and `once` (Deokjin Kim) nodejs#46018 * (SEMVER-MAJOR) fs: adjust `position` validation in reading methods (Livia Medeiros) nodejs#42835 * (SEMVER-MAJOR) fs: add globSync implementation (Moshe Atlow) nodejs#47653 * (SEMVER-MAJOR) http: reduce parts in chunked response when corking (Robert Nagy) nodejs#50167 * (SEMVER-MAJOR) lib: mark URL/URLSearchParams as uncloneable and untransferable (Chengzhong Wu) nodejs#47497 * (SEMVER-MAJOR) lib: remove aix directory case for package reader (Yagiz Nizipli) nodejs#48605 * (SEMVER-MAJOR) lib: add `navigator.hardwareConcurrency` (Yagiz Nizipli) nodejs#47769 * (SEMVER-MAJOR) lib: runtime deprecate punycode (Yagiz Nizipli) nodejs#47202 * (SEMVER-MAJOR) module: harmonize error code between ESM and CJS (Antoine du Hamel) nodejs#48606 * (SEMVER-MAJOR) net: do not treat `server.maxConnections=0` as `Infinity` (ignoramous) nodejs#48276 * (SEMVER-MAJOR) net: only defer \_final call when connecting (Jason Zhang) nodejs#47385 * (SEMVER-MAJOR) node-api: rename internal NAPI\_VERSION definition (Chengzhong Wu) nodejs#48501 * (SEMVER-MAJOR) src: update NODE\_MODULE\_VERSION to 120 (Michaël Zasso) nodejs#49639 * (SEMVER-MAJOR) src: throw DOMException on cloning non-serializable objects (Chengzhong Wu) nodejs#47839 * (SEMVER-MAJOR) src: throw DataCloneError on transfering untransferable objects (Chengzhong Wu) nodejs#47604 * (SEMVER-MAJOR) stream: use private properties for strategies (Yagiz Nizipli) nodejs#47218 * (SEMVER-MAJOR) stream: use private properties for encoding (Yagiz Nizipli) nodejs#47218 * (SEMVER-MAJOR) stream: use private properties for compression (Yagiz Nizipli) nodejs#47218 * (SEMVER-MAJOR) test\_runner: disallow array in `run` options (Raz Luvaton) nodejs#49935 * (SEMVER-MAJOR) test\_runner: support passing globs (Moshe Atlow) nodejs#47653 * (SEMVER-MAJOR) tls: use `validateNumber` for `options.minDHSize` (Deokjin Kim) nodejs#49973 * (SEMVER-MAJOR) tls: use validateFunction for `options.checkServerIdentity` (Deokjin Kim) nodejs#49896 * (SEMVER-MAJOR) util: runtime deprecate `promisify`-ing a function returning a `Promise` (Antoine du Hamel) nodejs#49609 * (SEMVER-MAJOR) vm: freeze `dependencySpecifiers` array (Antoine du Hamel) nodejs#49720 PR-URL: nodejs#49870 Co-authored-by: Michaël Zasso <targos@protonmail.com>
Avoid splitting chunked responses into multiple parts when corking. This makes a large difference performance-wise on the client side.
Previously when writing to a chunked response Node would create a separate chunk for each call to
.write(...)
regardless whether the response was corked or not. This leads to unnecessary overhead both on the client and server side.This PR fixes this by creating a single chunk for all calls to
write(...)
when uncorking the response.Consider the following example based on https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Transfer-Encoding#chunked_encoding:
Resulting in a response stream looking like this:
After this PR everything is combined into a single chunk when uncorking the response bypassing a lot of unnecessary overhead.
Refs: nodejs/performance#57