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## Summary Reworks pnpr from an install/file accelerator into a resolve-only accelerator: - `POST /v1/resolve` resolves against the client-supplied registries and returns a gzipped JSON lockfile response - pacquet/pnpm clients then fetch tarballs normally from registries with their own credentials and existing parallel fetch/integrity paths - pnpr no longer serves package file bytes or store-index rows, so the server-side file diff, file-frame response, grant table, and public-package byte-gating code are removed The follow-up resolution fast paths are included on the new measured path: - repeated public no-lockfile resolves use a bounded in-memory TTL cache - fresh frozen input lockfiles skip the server-side lockfile-only pacquet resolve after verification proves the lockfile is usable - input lockfile verification and the verdict cache are preserved ## Benchmark Integrated benchmark on Linux shows small improvements in all pnpr rows, with the clearest movement in hot restore. This should be treated as an incremental win rather than a large install-speed change. | Scenario | `pnpr@HEAD` | `pnpr@main` | Change | | --- | ---: | ---: | ---: | | fresh restore, cold cache + cold store | `1.677 s ± 0.090` | `1.686 s ± 0.070` | ~0.6% faster | | fresh restore, hot cache + hot store | `492.5 ms ± 18.1` | `521.9 ms ± 33.4` | ~5.6% faster | | fresh install, cold cache + cold store | `1.997 s ± 0.025` | `2.003 s ± 0.038` | ~0.3% faster | | fresh install, hot cache + hot store | `1.211 s ± 0.024` | `1.236 s ± 0.038` | ~2.0% faster | ## Trade-off Going registry-direct means pnpr no longer gates tarball bytes itself. Private package access is enforced by the upstream registry when the client fetches tarballs. Resolution policy still runs server-side: lockfile verification, release-age policy, trust policy, and resolved package selection continue to happen before the client fetches bytes.
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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 runtime.
- 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:
License
MIT, except the pnpr/ directory, which is source-available under the PolyForm Shield License 1.0.0.