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## Summary Store config dependency and package manager integrity info in a separate `pnpm-lock.env.yaml` lockfile instead of inlining it in `pnpm-workspace.yaml`. The workspace manifest now contains only clean version specifiers for `configDependencies`, while the resolved versions, integrity hashes, and tarball URLs are recorded in the new env lockfile. ### Key changes - **New `pnpm-lock.env.yaml` lockfile**: Uses the standard lockfile format (`importers`, `packages`, `snapshots`) to store resolved config dependencies and package manager dependencies with integrity hashes and tarball URLs. - **Automatic migration**: Projects using the old inline-hash format in `pnpm-workspace.yaml` are automatically migrated on install. - **Global Virtual Store (GVS) for version switching**: When switching pnpm versions via the `packageManager` field, pnpm is installed to the global virtual store (`$STORE_DIR/links/`) instead of `globalPkgDir`, reusing the content-addressable store for deduplication. - **Self-update uses headless install**: `pnpm self-update` performs frozen headless installs using integrity hashes from the env lockfile, then links bins to `PNPM_HOME`. - **`packageManagerDependencies`**: The env lockfile also stores resolved `packageManagerDependencies` during version switching and self-update. - **`@pnpm/exe` support**: Replicates `@pnpm/exe`'s postinstall script (linking platform-specific binaries) since install scripts are disabled. - **`pnpm setup` refactored**: Uses `pnpm add -g` instead of copying the CLI binary directly. - **Extracted `toLockfileResolution`** to `@pnpm/lockfile.utils` and **deduplicated `iteratePkgMeta`** into `@pnpm/calc-dep-state`. - **Removed unused `@pnpm/tools.path` package**.
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Fast, disk space efficient package manager:
- Fast. Up to 2x faster than the alternatives (see benchmark).
- Efficient. Files inside
node_modulesare 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 as a Node.js version manager. See pnpm env use.
- Works everywhere. Supports Windows, Linux, and macOS.
- Battle-tested. Used in production by teams of all sizes since 2016.
- See the full feature comparison with npm and Yarn.
To quote the Rush 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.
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Background
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:
- 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 updatewill only add 1 new file to the storage. - All the files are saved in a single place on the disk. When packages are installed, their files are linked from 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 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.
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Getting Started
Benchmark
pnpm is up to 2x faster than npm and Yarn classic. See all benchmarks here.
Benchmarks on an app with lots of dependencies:
