yarn berry

Yarn Berry vs pnpm: 1.3s vs 0.24s Install

Yarn 4.9.2 (Berry PnP + node-modules linker) vs pnpm 12.9.1 on one 22-dependency React+Vite app. Isolated caches (Yarn enableGlobalCache false; pnpm --store-dir). Warm medians (5): Yarn PnP 1.307 s, Yarn nm 2.471 s, pnpm 0.240 s. Lock+empty medians 1.656 / 2.789 / 0.725 s. Clean disk: Yarn PnP 246 MB; Yarn nm modules 189 MB; pnpm hardlink project 167 MB. Fixture /workspace/bench-yarn-pnpm/. Distinct from pnpm-vs-npm-vs-bun (no Yarn).