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…split + MSRV pin Whole-CI stacking to make the slowest lane (the PR gate) low, not one lane: - native-bazel: persistent disk cache on ALL lanes (Bazel 9 + Bazel 8), not only when cloud is off. Bazel 8 is ~2.6% warm on the Bazel-9-keyed remote cache; measured 729s cold -> 148s warm with the disk cache. - nix Bazel Dev: add actions/cache + --disk_cache to the nix-wrapped bazel test //... (same ~700s uncached-compile long pole, no setup-bazel knob). - nix generate-rbe-commands: list-only target, drop the nativelink rebuild from discovery (124s -> 93s) [folds X4]. - native-cargo: pin windows-2022 + ubuntu to MSRV 1.97.1 instead of floating stable, which drifted ahead and hard-errored on a deprecation lint (fetch_update), reddening the lane for a toolchain reason. Keeps it green. Co-Authored-By: Claude Opus 4.8 <[email protected]>
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Some of the pull request description still needs filling in:
Edit the description and this check re-runs on its own. The sections exist because they are the parts a reviewer cannot get from the diff: why the change is needed, how you know it works, what breaks if it is wrong, and which AI tools helped ("None" is a complete answer). |
Co-Authored-By: Claude Opus 4.8 <[email protected]>
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CI-spike measurement/experiment scratch — closing to keep the queue clean. Superseded by the single clean deliverable #25; branch retained if ever needed. |
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Non-blocking whole-CI experiment. Stacks: persistent disk cache on every bazel-test lane (native Bazel 9/8 + nix Bazel Dev), Tom's rbe-discovery split, and pins native-cargo to MSRV 1.97.1 to fix the toolchain-drift red lane. Goal: lower the MAX-lane (PR-gating) wall-clock, all green. Do not merge; does not touch hard-deck PR #6.