uv 0.12.9 reworks ZIP extraction to speed up cold-cache Python installs
KhuyenTran16 · x · 2026-09-16
Khuyen Tran breaks down a performance improvement in uv 0.12.9.
- uv normally reuses local package caches, but fresh CI jobs, Docker builds, and new machines start with an empty cache, so heavy dependencies still install slowly
- The new version assigns each package ZIP to a single dedicated extraction task instead of coordinating many small file operations, cutting overhead
- Real benchmarks for Jupyter, SymPy, and PyTorch CPU are shown in an accompanying diagram
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