Pnpm is a fast, disk-efficient package manager — uses hard links to save disk space and speed up installs.
What You Get for Free
- 2x faster — than npm for installing dependencies
- 3x less disk — shared store, hard links instead of copies
- Strict by default — prevents phantom dependencies
- Workspaces — first-class monorepo support
- Side-by-side versions — different versions of same package coexist
- Lockfile — deterministic installs across machines
- npm compatible — drop-in replacement for npm
- Patching — patch packages without forking
Quick Start
npm install -g pnpm
pnpm install # drop-in replacement for npm install
# Monorepo workspace
# pnpm-workspace.yaml
packages:
- 'packages/*'
- 'apps/*'
pnpm --filter @myorg/web dev # run dev in specific package
pnpm -r build # build all packages
Why Developers Switch from npm/yarn
npm copies every package into each project's node_modules:
- Shared store — 100 projects share one copy of React
- Strict mode — catches undeclared dependencies
- Faster CI — less to download, less to extract
-
Better monorepo —
pnpm -rand--filterjust work
A monorepo with 15 packages used 12GB of node_modules with npm. After pnpm: 4GB total (shared store),
pnpm installruns in 8 seconds vs npm's 45 seconds.
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