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Title: fs: read small files in one thread pool round trip by codebytere · Pull Request #65327 · nodejs/node · GitHub

Open Graph Title: fs: read small files in one thread pool round trip by codebytere · Pull Request #65327 · nodejs/node

X Title: fs: read small files in one thread pool round trip by codebytere · Pull Request #65327 · nodejs/node

Description: Node.js JavaScript runtime ✨🐢🚀✨. Contribute to nodejs/node development by creating an account on GitHub.

Open Graph Description: fs.readFile() / fs.promises.readFile() of small files get 3–6× faster, and use one libuv thread-pool task instead of four, by doing open + fstat + read + close in a single round trip. fs/readfile.j...

X Description: fs.readFile() / fs.promises.readFile() of small files get 3–6× faster, and use one libuv thread-pool task instead of four, by doing open + fstat + read + close in a single round trip. fs/readfile.j...

Opengraph URL: https://github.com/nodejs/node/pull/65327

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Aug 27, 2026 https://github.com/nodejs/node/pull/65327#ref-issue-5267855491
Node 26.8 breaks mock-fs at require time: TypeError: Cannot read properties of undefined (reading 'read') tschaub/mock-fs#447 https://github.com/tschaub/mock-fs/issues/447
SimenBhttps://github.com/SimenB
Aug 27, 2026 https://github.com/nodejs/node/pull/65327#ref-commit-692758f
https://github.com/SimenB
chore(jest-reporters): migrate CoverageReporter test off mock-fshttps://github.com/SimenB/jest/commit/692758ff3ff525220db7cdcd452b29e94b1bdee0
692758fhttps://github.com/SimenB/jest/commit/692758ff3ff525220db7cdcd452b29e94b1bdee0
nodejs/node#65327https://github.com/nodejs/node/pull/65327
tschaub/mock-fs#447https://github.com/tschaub/mock-fs/issues/447
https://github.com/SimenB
SimenBhttps://github.com/SimenB
Aug 27, 2026 https://github.com/nodejs/node/pull/65327#ref-pullrequest-5268051166
chore: migrate CoverageReporter test off mock-fs jestjs/jest#16401 https://github.com/jestjs/jest/pull/16401
https://github.com/TsuyoshiUshio
TsuyoshiUshiohttps://github.com/TsuyoshiUshio
Aug 27, 2026 https://github.com/nodejs/node/pull/65327#ref-issue-5271910273
CI: Node 26.8 breaks tests through mock-fs internals Azure/azure-functions-nodejs-worker#847 https://github.com/Azure/azure-functions-nodejs-worker/issues/847
ci: skip EMFILE test on Node.js 26 eslint/eslint#21265 https://github.com/eslint/eslint/pull/21265
Change Request: re-enable the EMFILE test on Node.js 26.8+ eslint/eslint#21274 https://github.com/eslint/eslint/issues/21274
https://github.com/sheremet-va
sheremet-vahttps://github.com/sheremet-va
Aug 29, 2026 https://github.com/nodejs/node/pull/65327#ref-pullrequest-5287331824
test: use fs.watch for the async leak fixture vitest-dev/vitest#11099 https://github.com/vitest-dev/vitest/pull/11099
davidgamerohttps://github.com/davidgamero
Aug 30, 2026 https://github.com/nodejs/node/pull/65327#ref-commit-0eb1a9a
https://github.com/davidgamero
ci: pin the Node 26 matrix entry to 26.7https://github.com/davidgamero/javascript/commit/0eb1a9aa5ca6497ca2c8daa647b2e7dee70a523a
0eb1a9ahttps://github.com/davidgamero/javascript/commit/0eb1a9aa5ca6497ca2c8daa647b2e7dee70a523a
nodejs/node#65327https://github.com/nodejs/node/pull/65327
kubernetes-client#3022https://github.com/kubernetes-client/javascript/pull/3022
tschaub/mock-fs#447https://github.com/tschaub/mock-fs/issues/447
https://github.com/uncoolclub
uncoolclubhttps://github.com/uncoolclub
Sep 2, 2026 https://github.com/nodejs/node/pull/65327#ref-pullrequest-5330446779
ci: restore EMFILE test on Node.js 26 eslint/eslint#21297 https://github.com/eslint/eslint/pull/21297
codebyterehttps://github.com/codebytere
Sep 3, 2026 https://github.com/nodejs/node/pull/65327#ref-commit-e324419
https://github.com/codebytere
fs: write files in one thread pool round triphttps://github.com/nodejs/node/commit/e3244199337c4e759642f777700929c73f1db456
e324419https://github.com/nodejs/node/commit/e3244199337c4e759642f777700929c73f1db456
#65489https://github.com/nodejs/node/pull/65489
#65327https://github.com/nodejs/node/pull/65327
aduh95https://github.com/aduh95
Sep 7, 2026 https://github.com/nodejs/node/pull/65327#ref-commit-bb4d42c
https://github.com/codebytere
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fs: write files in one thread pool round triphttps://github.com/nodejs/node/commit/bb4d42cfaca01767f4cc32445a05c979a0b45fc6
bb4d42chttps://github.com/nodejs/node/commit/bb4d42cfaca01767f4cc32445a05c979a0b45fc6
#65489https://github.com/nodejs/node/pull/65489
#65327https://github.com/nodejs/node/pull/65327
aduh95https://github.com/aduh95
Sep 7, 2026 https://github.com/nodejs/node/pull/65327#ref-commit-9a6bef4
https://github.com/codebytere
https://github.com/aduh95
fs: write files in one thread pool round triphttps://github.com/nodejs/node/commit/9a6bef435cac01306a573672390efc6a826061bf
9a6bef4https://github.com/nodejs/node/commit/9a6bef435cac01306a573672390efc6a826061bf
#65489https://github.com/nodejs/node/pull/65489
#65327https://github.com/nodejs/node/pull/65327
alexklihttps://github.com/alexkli
Sep 11, 2026 https://github.com/nodejs/node/pull/65327#ref-commit-0a95ba4
https://github.com/alexkli
https://github.com/claude
replace mock-fs with real temp dirs in config testshttps://github.com/adobe/sizewatcher/commit/0a95ba4abbc8992e779001c0984ec7df3b27aeaf
0a95ba4https://github.com/adobe/sizewatcher/commit/0a95ba4abbc8992e779001c0984ec7df3b27aeaf
nodejs/node#65327https://github.com/nodejs/node/pull/65327
tschaub/mock-fs#447https://github.com/tschaub/mock-fs/issues/447
https://github.com/alexkli
alexklihttps://github.com/alexkli
Sep 11, 2026 https://github.com/nodejs/node/pull/65327#ref-pullrequest-5419338765
Fix broken tests on latest Node 26.8 adobe/sizewatcher#150 https://github.com/adobe/sizewatcher/pull/150
alexklihttps://github.com/alexkli
Sep 11, 2026 https://github.com/nodejs/node/pull/65327#ref-commit-e5db996
https://github.com/alexkli
https://github.com/claude
replace mock-fs with real temp dirs in config testshttps://github.com/adobe/sizewatcher/commit/e5db996a7189597c61cc0cf05bb444835be8dc78
e5db996https://github.com/adobe/sizewatcher/commit/e5db996a7189597c61cc0cf05bb444835be8dc78
nodejs/node#65327https://github.com/nodejs/node/pull/65327
tschaub/mock-fs#447https://github.com/tschaub/mock-fs/issues/447
https://github.com/anurag6569201
anurag6569201https://github.com/anurag6569201
Sep 12, 2026 https://github.com/nodejs/node/pull/65327#ref-pullrequest-5436222307
ci: restore EMFILE test on Node.js 26 ShipWright-Review/eslint#2 https://github.com/ShipWright-Review/eslint/pull/2
aduh95https://github.com/aduh95
Sep 15, 2026 https://github.com/nodejs/node/pull/65327#ref-commit-6ac1bc0
https://github.com/codebytere
https://github.com/aduh95
fs: write files in one thread pool round triphttps://github.com/nodejs/node/commit/6ac1bc040f6d08e71e3aff7ea6f33027cc279a43
6ac1bc0https://github.com/nodejs/node/commit/6ac1bc040f6d08e71e3aff7ea6f33027cc279a43
#65489https://github.com/nodejs/node/pull/65489
#65327https://github.com/nodejs/node/pull/65327
https://github.com/vedchaudhari
vedchaudharihttps://github.com/vedchaudhari
Oct 15, 2026 https://github.com/nodejs/node/pull/65327#ref-pullrequest-5864687397
fs: restore stack traces of fs/promises readFile and writeFile errors #66757 https://github.com/nodejs/node/pull/66757
https://github.com/christianaurichzm
christianaurichzmhttps://github.com/christianaurichzm
Oct 23, 2026 https://github.com/nodejs/node/pull/65327#ref-pullrequest-5989742539
fs: keep readFile abortable on non-regular files #66940 https://github.com/nodejs/node/pull/66940
https://github.com/mcrowder65
mcrowder65https://github.com/mcrowder65
Oct 23, 2026 https://github.com/nodejs/node/pull/65327#ref-pullrequest-5997446303
chore: move toolchain to Node 26.12.1 (October 2026 security release) mcrowder65/immich-trim#2 https://github.com/mcrowder65/immich-trim/pull/2
Netlify build fails with "Could not patch functions config manifest file" on Node.js 26.8+ Alice39s/kuma-mieru#505 https://github.com/Alice39s/kuma-mieru/issues/505
fix: create server dir before patching functions-config-manifest.json opennextjs/opennextjs-netlify#3599 https://github.com/opennextjs/opennextjs-netlify/pull/3599
netlify build fails with "Could not patch functions config manifest file" on Node.js 26.8+ with Node.js middleware opennextjs/opennextjs-netlify#3600 https://github.com/opennextjs/opennextjs-netlify/issues/3600
https://github.com/3zrv
3zrvhttps://github.com/3zrv
Oct 29, 2026 https://github.com/nodejs/node/pull/65327#ref-pullrequest-6103785172
fs: harden the one-round-trip read and write jobs #67112 https://github.com/nodejs/node/pull/67112
SaigyoujYuyukohttps://github.com/SaigyoujYuyuko
Oct 30, 2026 https://github.com/nodejs/node/pull/65327#ref-commit-5cf9ffd
https://github.com/SaigyoujYuyuko
perf(whole): read_bytes / read_bytes_many 改为原生单跳作业（1.71x）https://github.com/SaigyoujYuyuko/ayafileio/commit/5cf9ffdfeb0c2b892fe385ef58d5a59b5dadd765
5cf9ffdhttps://github.com/SaigyoujYuyuko/ayafileio/commit/5cf9ffdfeb0c2b892fe385ef58d5a59b5dadd765
nodejs/node#65327https://github.com/nodejs/node/pull/65327
vedchaudharihttps://github.com/vedchaudhari
Oct 31, 2026 https://github.com/nodejs/node/pull/65327#ref-commit-42e6ebd
https://github.com/vedchaudhari
fs: restore stack traces of fs/promises readFile and writeFile errorshttps://github.com/vedchaudhari/node/commit/42e6ebd382053fdcbd5429a31badb53ec4546693
42e6ebdhttps://github.com/vedchaudhari/node/commit/42e6ebd382053fdcbd5429a31badb53ec4546693
nodejs#65327https://github.com/nodejs/node/pull/65327
nodejs#65489https://github.com/nodejs/node/pull/65489
vedchaudharihttps://github.com/vedchaudhari
Oct 31, 2026 https://github.com/nodejs/node/pull/65327#ref-commit-b9df2e3
https://github.com/vedchaudhari
fs: restore stack traces of fs/promises readFile and writeFile errorshttps://github.com/vedchaudhari/node/commit/b9df2e314f1d02d3ea4802479016b603bf059837
b9df2e3https://github.com/vedchaudhari/node/commit/b9df2e314f1d02d3ea4802479016b603bf059837
nodejs#65327https://github.com/nodejs/node/pull/65327
nodejs#65489https://github.com/nodejs/node/pull/65489
https://github.com/mrgrain
mrgrainhttps://github.com/mrgrain
Nov 3, 2026 https://github.com/nodejs/node/pull/65327#ref-pullrequest-6180280596
chore(integ-runner): unit tests fail on Node 26.8+ because mock-fs cannot load aws/aws-cdk-cli#2117 https://github.com/aws/aws-cdk-cli/pull/2117
mrgrainhttps://github.com/mrgrain
Nov 3, 2026 https://github.com/nodejs/node/pull/65327#ref-commit-58a3bb3
https://github.com/mrgrain
chore(integ-runner): unit tests fail on Node 26.8+ because mock-fs ca…https://github.com/abhiramshaji-cyber/aws-cdk-cli/commit/58a3bb3e05b21d4083a511c4e863344dacbffb87
58a3bb3https://github.com/abhiramshaji-cyber/aws-cdk-cli/commit/58a3bb3e05b21d4083a511c4e863344dacbffb87
aws#2117https://github.com/aws/aws-cdk-cli/pull/2117
nodejs/node#65327https://github.com/nodejs/node/pull/65327
nodejs/node#65327https://github.com/nodejs/node/pull/65327
tschaub/mock-fs#447https://github.com/tschaub/mock-fs/issues/447
tschaub/mock-fs#447https://github.com/tschaub/mock-fs/issues/447
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