Fast, disk space efficient package manager

Features:

• Fast. As fast as npm and Yarn.
• Efficient. Files inside node_modules are linked from a single content-addressable storage.
• Great for monorepos.
• Strict. A package can access only dependencies that are specified in its package.json.
• Deterministic. Has a lockfile called pnpm-lock.yaml.
• Works everywhere. Works on Windows, Linux, and OS X.

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• Background
• Install
• Usage
• Benchmark
• Support
• Contributors

pnpm uses a content-addressable filesystem to store all files from all module directories on a disk. When using npm or Yarn, 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 hard-linked from that single place consuming no additional disk space.

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 unique node_modules structure that pnpm creates and why it works fine with the Node.js ecosystem, read this small article: Flat node_modules is not the only way.

Using a standalone script:

curl -L https://raw.githubusercontent.com/pnpm/self-installer/master/install.js | node

On Windows (PowerShell):

(Invoke-WebRequest 'https://raw.githubusercontent.com/pnpm/self-installer/master/install.js').Content | node

Via npx:

npx pnpm add -g pnpm

Once you first installed pnpm, you can upgrade it using pnpm:

pnpm add -g pnpm

Do you wanna use pnpm on CI servers? See: Continuous Integration.

Just use pnpm in place of npm. For instance, to install run:

pnpm install

For more advanced usage, read pnpm CLI on our website.

For using the programmatic API, use pnpm's engine: supi.

npm has a great package runner called npx. pnpm offers the same tool via the pnpx command. The only difference is that pnpx uses pnpm for installing packages.

The following command installs a temporary create-react-app and calls it, without polluting global installs or requiring more than one step!

pnpx create-react-app my-cool-new-app

pnpm is as fast as npm and Yarn. See all benchmarks here.

Benchmarks on a React app:

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MIT