Skip to content
Node.js JavaScript runtime 🐢🚀
Branch: master
Clone or download
bmeurer and addaleax deps: V8: cherry-pick cca9ae3c9a
Original commit message:

    Remove recursion from NeedsCheckHeapObject.

    We use the predicate NeedsCheckHeapObject in the compiler frontend to
    determine whether we can skip introducing CheckHeapObject nodes. But
    this predicate would also walk up the graph in case of Phis, which can
    result in really long compilation times (on the main thread). In the
    report in #27667, the compiler
    frontend alone took around 4-5mins of main thread time for a single
    function. With this patch the time goes down to 4-5ms.

    Bug: v8:9250
    Refs: #27667
    Change-Id: I231eb780ff04f949fa1669714f9af6ebfbcade05
    Reviewed-by: Jaroslav Sevcik <>
    Commit-Queue: Benedikt Meurer <>
    Cr-Commit-Position: refs/heads/master@{#61503}

Fixes: #27667

PR-URL: #27729
Reviewed-By: Michaël Zasso <>
Reviewed-By: Colin Ihrig <>
Reviewed-By: Ruben Bridgewater <>
Reviewed-By: Rich Trott <>
Reviewed-By: Michael Dawson <>
Reviewed-By: James M Snell <>
Latest commit 6f7e8b4 May 15, 2019
Type Name Latest commit message Commit time
Failed to load latest commit information.
.github doc: add multiple issue templates for GitHub Aug 12, 2018
benchmark tools: enable block-scoped-var eslint rule May 10, 2019
deps deps: V8: cherry-pick cca9ae3c9a May 19, 2019
doc stream: use readableObjectMode public api for js stream May 19, 2019
lib stream: use readableObjectMode public api for js stream May 19, 2019
src inspector: mark profile type const May 19, 2019
test stream: use readableObjectMode public api for js stream May 19, 2019
tools tools: remove unneeded dependency files May 19, 2019
.clang-format tools: add `make format-cpp` to run clang-format on C++ diffs Aug 3, 2018
.cpplint tools: move cpplint configuration to .cpplint Apr 8, 2019
.editorconfig tools: unify .editorconfig rules for 2-space Oct 1, 2018
.eslintignore test: run eslint on test file and fix errors Dec 15, 2018
.eslintrc.js tools: update capitalized-comments eslint rule May 16, 2019
.flake8 tools: python: ignore instead of select flake8 rules Apr 14, 2019
.gitattributes src: limit .gitattributes eol to vcbuild.bat Jan 13, 2015
.gitignore tools: add Release and Debug symlinks to .gitignore May 2, 2019
.mailmap doc: update AUTHORS list Mar 5, 2019
.nycrc test: fix tests that fail under coverage May 22, 2018
.travis.yml build: remove redundant pyenv call in Travis build Apr 18, 2019
AUTHORS doc: update AUTHORS list Mar 5, 2019
BSDmakefile node: rename from io.js to node Aug 23, 2015 doc: add example to test doc for clarity May 7, 2019 doc,tools: updates for 6.x End-of-Life May 14, 2019 doc: simplify Nov 2, 2018 doc: remove "How is an LTS release cut?" section Mar 30, 2019 doc: streamline Nov 5, 2018 doc: fix heading in cpp style guide Jan 7, 2019 doc: simplify text Apr 26, 2019
LICENSE deps: add acorn stage-3 plugins Apr 30, 2019
Makefile build: delegate building from Makefile to ninja May 3, 2019 meta: move jhamhader to Collaborator Emeriti list May 17, 2019 doc: add to Nov 4, 2018
android-configure build: don't create directory for NDK toolchain Mar 22, 2017
common.gypi deps: V8: cherry-pick 5d0cf6b Apr 28, 2019
configure build: remove unsupported Python 2.6 from configure Apr 30, 2019 build: delegate building from Makefile to ninja May 3, 2019
node.gyp tools: refactor for maximal Python3 compatibility May 18, 2019
node.gypi build: run `mkcodecache` as an action Apr 16, 2019
vcbuild.bat build: add arm64 to vcbuild.bat help message May 17, 2019


Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine. For more information on using Node.js, see the Node.js Website.

The Node.js project uses an open governance model. The Node.js Foundation provides support for the project.

This project is bound by a Code of Conduct.

Table of Contents


Node.js contributors have limited availability to address general support questions. Please make sure you are using a currently-supported version of Node.js.

When looking for support, please first search for your question in these venues:

If you didn't find an answer in the resources above, try these unofficial resources:

GitHub issues are for tracking enhancements and bugs, not general support.

The open source license grants you the freedom to use Node.js. It does not guarantee commitments of other people's time. Please be respectful and manage your expectations.

Release Types

  • Current: Under active development. Code for the Current release is in the branch for its major version number (for example, v10.x). Node.js releases a new major version every 6 months, allowing for breaking changes. This happens in April and October every year. Releases appearing each October have a support life of 8 months. Releases appearing each April convert to LTS (see below) each October.
  • LTS: Releases that receive Long-term Support, with a focus on stability and security. Every even-numbered major version will become an LTS release. LTS releases receive 18 months of Active LTS support and a further 12 months of Maintenance. LTS release lines have alphabetically-ordered codenames, beginning with v4 Argon. There are no breaking changes or feature additions, except in some special circumstances.
  • Nightly: Code from the Current branch built every 24-hours when there are changes. Use with caution.

Current and LTS releases follow Semantic Versioning. A member of the Release Team signs each Current and LTS release. For more information, see the Release README.


Binaries, installers, and source tarballs are available at

Current and LTS Releases

The latest directory is an alias for the latest Current release. The latest-codename directory is an alias for the latest release from an LTS line. For example, the latest-carbon directory contains the latest Carbon (Node.js 8) release.

Nightly Releases

Each directory name and filename contains a date (in UTC time) and the commit SHA at the HEAD of the release.

API Documentation

Documentation for the latest Current release is at Version-specific documentation is available in each release directory in the docs subdirectory. Version-specific documentation is also at

Verifying Binaries

Download directories contain a SHASUMS256.txt file with SHA checksums for the files.

To download SHASUMS256.txt using curl:

$ curl -O

To check that a downloaded file matches the checksum, run it through sha256sum with a command such as:

$ grep node-vx.y.z.tar.gz SHASUMS256.txt | sha256sum -c -

For Current and LTS, the GPG detached signature of SHASUMS256.txt is in SHASUMS256.txt.sig. You can use it with gpg to verify the integrity of SHASUM256.txt. You will first need to import the GPG keys of individuals authorized to create releases. To import the keys:

$ gpg --keyserver --recv-keys DD8F2338BAE7501E3DD5AC78C273792F7D83545D

See the bottom of this README for a full script to import active release keys.

Next, download the SHASUMS256.txt.sig for the release:

$ curl -O

Then use gpg --verify SHASUMS256.txt.sig SHASUMS256.txt to verify the file's signature.

Building Node.js

See for instructions on how to build Node.js from source and a list of supported platforms.


For information on reporting security vulnerabilities in Node.js, see

Current Project Team Members

For information about the governance of the Node.js project, see

TSC (Technical Steering Committee)

TSC Emeriti


Collaborator Emeriti

Collaborators follow the in maintaining the Node.js project.

Release Keys

GPG keys used to sign Node.js releases:

To import the full set of trusted release keys:

gpg --keyserver --recv-keys 4ED778F539E3634C779C87C6D7062848A1AB005C
gpg --keyserver --recv-keys B9E2F5981AA6E0CD28160D9FF13993A75599653C
gpg --keyserver --recv-keys 94AE36675C464D64BAFA68DD7434390BDBE9B9C5
gpg --keyserver --recv-keys B9AE9905FFD7803F25714661B63B535A4C206CA9
gpg --keyserver --recv-keys 77984A986EBC2AA786BC0F66B01FBB92821C587A
gpg --keyserver --recv-keys 71DCFD284A79C3B38668286BC97EC7A07EDE3FC1
gpg --keyserver --recv-keys FD3A5288F042B6850C66B31F09FE44734EB7990E
gpg --keyserver --recv-keys 8FCCA13FEF1D0C2E91008E09770F7A9A5AE15600
gpg --keyserver --recv-keys C4F0DFFF4E8C1A8236409D08E73BC641CC11F4C8
gpg --keyserver --recv-keys DD8F2338BAE7501E3DD5AC78C273792F7D83545D
gpg --keyserver --recv-keys A48C2BEE680E841632CD4E44F07496B3EB3C1762

See the section above on Verifying Binaries for how to use these keys to verify a downloaded file.

Other keys used to sign some previous releases:

Contributing to Node.js

You can’t perform that action at this time.