Mitts cuts 12 worktree rustls builds to 9.3 seconds

The author introduces Mitts, a pre-release tool designed to speed up parallel builds across multiple worktrees by sharing immutable compilation results instead of repeating identical work. In a parallel test of twelve rustls worktrees, Cargo took 3 minutes and 42 seconds, while Mitts completed the batch in 9.3 seconds. The software separates mutable workspaces from immutable, atomically published objects using action keys, though it currently lacks support for Windows, cross-compilation, and remote caches. Open article →