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Fast, disk space efficient package manager:

• Fast. Up to 2x faster than the alternatives (seebenchmark).
• Efficient. Files insidenode_modules are linked from a single content-addressable storage.
• Great for monorepos.
• Strict. A package can access only dependencies that are specified in itspackage.json.
• Deterministic. Has a lockfile calledpnpm-lock.yaml.
• Works as a Node.js version manager. Seepnpm env use.
• Works everywhere. Supports Windows, Linux, and macOS.
• Battle-tested. Used in production by teams ofall sizes since 2016.
• See the full feature comparison with npm and Yarn.

To quote theRush team:

Microsoft uses pnpm in Rush repos with hundreds of projects and hundreds of PRs per day, and we’ve found it to be very fast and reliable.

Support this project bybecoming a sponsor.

pnpm uses a content-addressable filesystem to store all files from all module directories on a disk.When using npm, if you have 100 projects using lodash, you will have 100 copies of lodash on disk.With pnpm, lodash will be stored in a content-addressable storage, so:

1. If you depend on different versions of lodash, only the files that differ are added to the store.If lodash has 100 files, and a new version has a change only in one of those files,pnpm update will only add 1 new file to the storage.
2. All the files are saved in a single place on the disk. When packages are installed, their files are linkedfrom that single place consuming no additional disk space. Linking is performed using either hard-links or reflinks (copy-on-write).

As a result, you save gigabytes of space on your disk and you have a lot faster installations!If you'd like more details about the uniquenode_modules structure that pnpm creates andwhy it works fine with the Node.js ecosystem, read this small article:Flat node_modules is not the only way.

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pnpm is up to 2x faster than npm and Yarn classic. See all benchmarkshere.

Benchmarks on an app with lots of dependencies:

MIT