Explore memory consequences of path mapping

[gregestren]

[gregestren]

@justinhorvitz has been doing extensive memory optimizations in Bazel for some time. He noted path mapping could have memory impact.

This is a placeholder to explore that impact (also see b/284353244). We should properly land #18155 (possibly in separate PRs) before exploring, as that has a number of changes to the core logic.

[github-actions]

Thank you for contributing to the Bazel repository! This issue has been marked as stale since it has not had any activity in the last 1+ years. It will be closed in the next 90 days unless any other activity occurs. If you think this issue is still relevant and should stay open, please post any comment here and the issue will no longer be marked as stale.