A Rust-backed package manager for JavaScript. Native installs, a shared package store, and familiar Node.js projects. Bring your lockfile. Keep building.
npm install -g fnpmPublic npm publication pending. Build from source ↗
Then follow the quickstart23 workspaces · pnpm lockfile · 8ea9eb9 ↗
Cold install · seconds, median of 3 runs
| Tool / version | Seconds | Lockfile |
|---|---|---|
| fnpm 0.0.2 | 5.5416 | migrated from pnpm-lock.yaml |
| bun 1.4.4 | 5.6774 | migrated from pnpm-lock.yaml |
| pnpm 10.33.0 | 15.2390 | the project's own pnpm-lock.yaml |
| yarn 1.22.22 | — | yarn cannot read catalog: dependency specifiers |
| npm 11.19.1 | — | npm cannot read workspace: or catalog: dependency specifiers |
1.02× faster than Bun in this snapshot
Warm cache · seconds, median of 3 runs
| Tool / version | Seconds | Lockfile |
|---|---|---|
| fnpm 0.0.2 | 0.7809 | migrated from pnpm-lock.yaml |
| bun 1.4.4 | 0.9632 | migrated from pnpm-lock.yaml |
| pnpm 10.33.0 | 6.1904 | the project's own pnpm-lock.yaml |
| yarn 1.22.22 | — | yarn cannot read catalog: dependency specifiers |
| npm 11.19.1 | — | npm cannot read workspace: or catalog: dependency specifiers |
1.23× faster than Bun in this snapshot
No-op · seconds, median of 3 runs
| Tool / version | Seconds | Lockfile |
|---|---|---|
| fnpm 0.0.2 | 0.0068 | migrated from pnpm-lock.yaml |
| bun 1.4.4 | 0.0888 | migrated from pnpm-lock.yaml |
| pnpm 10.33.0 | 2.6415 | the project's own pnpm-lock.yaml |
| yarn 1.22.22 | — | yarn cannot read catalog: dependency specifiers |
| npm 11.19.1 | — | npm cannot read workspace: or catalog: dependency specifiers |
13.06× faster than Bun in this snapshot
43 workspaces · pnpm lockfile · 8d09833 ↗
Cold install · seconds, median of 3 runs
| Tool / version | Seconds | Lockfile |
|---|---|---|
| fnpm 0.0.2 | 5.8114 | migrated from pnpm-lock.yaml |
| bun 1.4.4 | 5.6859 | migrated from pnpm-lock.yaml |
| pnpm 12.4.1 | 140.7165 | the project's own pnpm-lock.yaml |
| yarn 1.22.22 | — | yarn cannot read catalog: dependency specifiers |
| npm 11.19.1 | — | npm cannot read workspace: or catalog: dependency specifiers |
1.02× Bun's duration in this snapshot
Warm cache · seconds, median of 3 runs
| Tool / version | Seconds | Lockfile |
|---|---|---|
| fnpm 0.0.2 | 0.8430 | migrated from pnpm-lock.yaml |
| bun 1.4.4 | 0.7964 | migrated from pnpm-lock.yaml |
| pnpm 12.4.1 | 2.9687 | the project's own pnpm-lock.yaml |
| yarn 1.22.22 | — | yarn cannot read catalog: dependency specifiers |
| npm 11.19.1 | — | npm cannot read workspace: or catalog: dependency specifiers |
1.06× Bun's duration in this snapshot
No-op · seconds, median of 3 runs
| Tool / version | Seconds | Lockfile |
|---|---|---|
| fnpm 0.0.2 | 0.0092 | migrated from pnpm-lock.yaml |
| bun 1.4.4 | 0.1780 | migrated from pnpm-lock.yaml |
| pnpm 12.4.1 | 0.3851 | the project's own pnpm-lock.yaml |
| yarn 1.22.22 | — | yarn cannot read catalog: dependency specifiers |
| npm 11.19.1 | — | npm cannot read workspace: or catalog: dependency specifiers |
19.35× faster than Bun in this snapshot
Measured October 26, 2026 · fnpm · Bun · pnpm · Yarn · npm · scripts disabled · warm OS and registry caches. A tool that cannot install a repository's format keeps its row. 8 more repositories are being measured. Methodology ↗
MEASURED IN 2 REAL REPOSITORIES
INSTALL BENCHMARKS
Cold cache, warm cache, or a no-op reinstall. fnpm, Bun, pnpm, Yarn and npm on 2 pinned repositories, each followed by a real project check.
Empty package cache · no node_modules · prepared lockfile
| Tool / version | Seconds | Lockfile |
|---|---|---|
| fnpm 0.0.2 | 5.5416 | migrated from pnpm-lock.yaml |
| bun 1.4.4 | 5.6774 | migrated from pnpm-lock.yaml |
| pnpm 10.33.0 | 15.2390 | the project's own pnpm-lock.yaml |
| yarn 1.22.22 | — | yarn cannot read catalog: dependency specifiers |
| npm 11.19.1 | — | npm cannot read workspace: or catalog: dependency specifiers |
1.02× faster than Bun in this snapshot
Packages already cached · node_modules rebuilt
| Tool / version | Seconds | Lockfile |
|---|---|---|
| fnpm 0.0.2 | 0.7809 | migrated from pnpm-lock.yaml |
| bun 1.4.4 | 0.9632 | migrated from pnpm-lock.yaml |
| pnpm 10.33.0 | 6.1904 | the project's own pnpm-lock.yaml |
| yarn 1.22.22 | — | yarn cannot read catalog: dependency specifiers |
| npm 11.19.1 | — | npm cannot read workspace: or catalog: dependency specifiers |
1.23× faster than Bun in this snapshot
Keep cache and node_modules · reinstall after nothing changed
| Tool / version | Seconds | Lockfile |
|---|---|---|
| fnpm 0.0.2 | 0.0068 | migrated from pnpm-lock.yaml |
| bun 1.4.4 | 0.0888 | migrated from pnpm-lock.yaml |
| pnpm 10.33.0 | 2.6415 | the project's own pnpm-lock.yaml |
| yarn 1.22.22 | — | yarn cannot read catalog: dependency specifiers |
| npm 11.19.1 | — | npm cannot read workspace: or catalog: dependency specifiers |
13.06× faster than Bun in this snapshot
Empty package cache · no node_modules · prepared lockfile
| Tool / version | Seconds | Lockfile |
|---|---|---|
| fnpm 0.0.2 | 5.8114 | migrated from pnpm-lock.yaml |
| bun 1.4.4 | 5.6859 | migrated from pnpm-lock.yaml |
| pnpm 12.4.1 | 140.7165 | the project's own pnpm-lock.yaml |
| yarn 1.22.22 | — | yarn cannot read catalog: dependency specifiers |
| npm 11.19.1 | — | npm cannot read workspace: or catalog: dependency specifiers |
1.02× Bun's duration in this snapshot
Packages already cached · node_modules rebuilt
| Tool / version | Seconds | Lockfile |
|---|---|---|
| fnpm 0.0.2 | 0.8430 | migrated from pnpm-lock.yaml |
| bun 1.4.4 | 0.7964 | migrated from pnpm-lock.yaml |
| pnpm 12.4.1 | 2.9687 | the project's own pnpm-lock.yaml |
| yarn 1.22.22 | — | yarn cannot read catalog: dependency specifiers |
| npm 11.19.1 | — | npm cannot read workspace: or catalog: dependency specifiers |
1.06× Bun's duration in this snapshot
Keep cache and node_modules · reinstall after nothing changed
| Tool / version | Seconds | Lockfile |
|---|---|---|
| fnpm 0.0.2 | 0.0092 | migrated from pnpm-lock.yaml |
| bun 1.4.4 | 0.1780 | migrated from pnpm-lock.yaml |
| pnpm 12.4.1 | 0.3851 | the project's own pnpm-lock.yaml |
| yarn 1.22.22 | — | yarn cannot read catalog: dependency specifiers |
| npm 11.19.1 | — | npm cannot read workspace: or catalog: dependency specifiers |
19.35× faster than Bun in this snapshot
Linux x64 / ext4 · 8 CPU cores · Node 24.22.1 · private package-manager caches · lifecycle scripts disabled · shared machine. Versions: Bun 1.4.4; pnpm 10.33.0, 12.4.1; Yarn 1.22.22; npm 11.19.1. “Fresh resolve” means the tool had no lockfile of its own in that repository, so its package versions can differ. 4 tool/repository pairs could not install and are marked. See ranges, package sets, and project checks ↗
DISK USAGE
Combined physical space for node_modules and each tool's private package cache or store, measured before any build. Shared hardlinks count once.
How the package store works →OpenNext Cloudflare · combined physical disk, lower is better
| Tool / version | MiB | Lockfile |
|---|---|---|
| fnpm 0.0.2 | 2592.96 | migrated from pnpm-lock.yaml |
| bun 1.4.4 | 2653.38 | migrated from pnpm-lock.yaml |
| pnpm 10.33.0 | 2580.19 | the project's own pnpm-lock.yaml |
| yarn 1.22.22 | — | yarn cannot read catalog: dependency specifiers |
| npm 11.19.1 | — | npm cannot read workspace: or catalog: dependency specifiers |
fnpm used 2.3% less disk than Bun
tRPC · combined physical disk, lower is better
| Tool / version | MiB | Lockfile |
|---|---|---|
| fnpm 0.0.2 | 2490.89 | migrated from pnpm-lock.yaml |
| bun 1.4.4 | 2558.46 | migrated from pnpm-lock.yaml |
| pnpm 12.4.1 | 3382.89 | the project's own pnpm-lock.yaml |
| yarn 1.22.22 | — | yarn cannot read catalog: dependency specifiers |
| npm 11.19.1 | — | npm cannot read workspace: or catalog: dependency specifiers |
fnpm used 2.6% less disk than Bun
Shared reflink extents are not identified. Package sets differ where a tool resolved its own versions. Every repository ↗
ONE PACKAGE. FOUR COMMANDS.
Install, add, update, and manage dependencies. Native Rust launchers handle the hot paths.
fnpm install →Bring npm, pnpm, Yarn, or Bun lockfiles. Inspect, migrate, verify, compare, and export.
fnpm-lock verify →Run package executables with the same package store. Two aliases, one command.
fnpx cowsay hello →Built in the open. Full Bun package-manager parity and the all-scenario speed target are still in progress. Compatibility status →