Requires hyperfine. The goal of this benchmark is to compare installation performance of Bun with other package managers when caches are hot.

To run the benchmark with the standard "install" command for each package manager:

$ hyperfine --prepare 'rm -rf node_modules' --warmup 1 --runs 3 'bun install' 'pnpm install' 'yarn' 'npm install'

Even though all packages are cached, some tools may hit the npm API during the version resolution step. (This is not the same as re-downloading a package.) To entirely avoid network calls, the other package managers require --prefer-offline/--offline flag. To run the benchmark using "offline" mode:

$ hyperfine --prepare 'rm -rf node_modules' --runs 1 'bun install' 'pnpm install --prefer-offline' 'yarn --offline' 'npm install --prefer-offline'

To run the benchmark with offline mode but without lockfiles:

$ hyperfine --prepare 'rm -rf node_modules' --warmup 1 'rm bun.lockb && bun install' 'rm pnpm-lock.yaml && pnpm install --prefer-offline' 'rm yarn.lock && yarn --offline' 'rm package-lock.json && npm install --prefer-offline'

To check that the app is working as expected:

$ bun run dev
$ npm run dev
$ yarn dev
$ pnpm dev

Then visit http://localhost:3000.