[8.8.0] Prefetch .bzl files in the remote repo contents cache#29082
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`.bzl` files are typically small, but can form deep DAGs that require a large number of sequential cache requests to fetch lazily. By prefetching them (as well as `REPO.bazel` files) eagerly, the wall time of one particular fully cached cold `--nobuild` build of Bazel itself decreased by a factor of 5. Along the way, make remote repo contents cache failures non-fatal, matching the behavior of the remote cache. Closes bazelbuild#27910. PiperOrigin-RevId: 853153815 Change-Id: I368a14a845a8d9fb543f473d8c0c2178a4590c78 (cherry picked from commit 361c420)
Wyverald
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.bzlfiles are typically small, but can form deep DAGs that require a large number of sequential cache requests to fetch lazily. By prefetching them (as well asREPO.bazelfiles) eagerly, the wall time of one particular fully cached cold--nobuildbuild of Bazel itself decreased by a factor of 5.Along the way, make remote repo contents cache failures non-fatal, matching the behavior of the remote cache.
Closes #27910.
PiperOrigin-RevId: 853153815
Change-Id: I368a14a845a8d9fb543f473d8c0c2178a4590c78
(cherry picked from commit 361c420)