rays 3a3900e959 Image builds keep compiled crates between builds (#438) ...

The ipx Dockerfile built its dependencies in a layer of stub crates,
which any change to Cargo.toml or Cargo.lock invalidated: all of them
compiled again in release, 405 crates, 170 s at the builder's cap. The
directory's had no such layer and compiled everything every time. Both
now build with cargo's registry and target/ as BuildKit cache mounts.
Measured on Tower: a Cargo.toml change rebuilds three crates in 52 s
instead of 405 in 170 s. The peak is about the same, since the ipx
crate itself is most of it; what goes is the minutes at the cap.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2026-11-09 14:05:12 +00:00

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