- Upgrade `@pnpm/semver-diff` and `@pnpm/colorize-semver-diff` to v2, which expose the helpers as named exports. - Update the call sites in `@pnpm/deps.inspection.commands` and `@pnpm/installing.commands` from `semverDiff.default(...)` / `colorizeSemverDiff.default(...)` to plain `semverDiff(...)` / `colorizeSemverDiff(...)`. - Refactor `buildPkgChoice` in `getUpdateChoices.ts` to build the row as a `string[]`. Previously the row was an object whose values relied on `nextVersion` being inferred as `any` (a side effect of the broken `.default` access poisoning the type) — that masked `outdatedPkg.current` and `outdatedPkg.workspace` being `string | undefined`. With the v2 named imports the types tighten up, and `Object.values(lineParts)` would no longer assign cleanly to `string[]`. The previous v1 packages exported their helpers as `module.exports.default = fn`, so `.default(...)` only worked through the legacy CJS interop — and it broke under Node.js ESM (which is what the Jest runner uses with `--experimental-vm-modules`). Most of the `deps/inspection/commands` outdated tests had been silently failing on `main` with `TypeError: semverDiff.default is not a function`; this change brings them back.
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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: