yarn

Yarn caches packages locally and performs operations concurrently, significantly reducing install times compared to early npm versions, as highlighted in the README.

Uses a lockfile and deterministic algorithm to guarantee identical installations across all systems, eliminating 'it works on my machine' issues.

Verifies package checksums before execution, protecting against compromised code, which is a core security feature emphasized in the project description.

Allows reinstalling packages from cache without an internet connection, ideal for development in low-connectivity environments, as noted in the features list.