Choosing the right JavaScript package manager in 2026—npm, yarn, pnpm, or Bun—is critical for development speed and efficiency. This comprehensive guide analyzes key benchmarks, including cold install times, disk usage, and monorepo support. Bun emerges as the fastest for cold installs (28x faster than npm in large projects), while pnpm excels in disk efficiency, saving up to 87% space across multiple projects.

For enterprise stability, npm remains the default, and yarn 4 offers powerful plugins and PnP mode. The analysis covers security features, compatibility issues, and migration strategies, concluding that project size and team needs dictate the best choice.