A fast, disk space efficient package manager for JavaScript and Node.js.
pnpm is a fast and disk space efficient package manager for JavaScript and Node.js. It solves the problem of slow installations and excessive disk usage by using a content-addressable storage system that links files instead of copying them, making it ideal for projects with many dependencies or monorepos.
JavaScript and Node.js developers, especially those working on large projects, monorepos, or in environments where disk space and installation speed are critical concerns.
Developers choose pnpm for its significant performance improvements and disk space savings over npm and Yarn, its strict dependency isolation that prevents phantom dependencies, and its robust support for monorepos.
Fast, disk space efficient package manager
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Benchmarks show installations up to 2x faster than npm and Yarn classic, significantly reducing CI/CD pipeline times as highlighted in the README.
Uses a single content-addressable storage to link files, avoiding duplicate copies and saving gigabytes across projects, as described in the background section.
Excellent workspace features, proven in production by teams like Microsoft with hundreds of projects, making it ideal for large-scale monorepos.
Prevents phantom dependencies by ensuring packages only access specified dependencies in package.json, reducing version conflicts and improving reliability.
Its non-standard node_modules structure using symlinks can break tools expecting npm's flat layout, requiring workarounds or patches for some packages.
While battle-tested, it has fewer third-party integrations and community resources compared to npm's vast ecosystem, which can limit tooling options.
Switching from npm or Yarn involves learning new commands and lockfile formats (pnpm-lock.yaml), with potential hiccups in existing project setups.
pnpm is an open-source alternative to the following products: