perf(orchestrator): store treehash mapping before graph computation - #266
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Move the treehash cache write from after the graph computation to before it. This lets concurrent or subsequent requests resolve the BuildDescription→treehash mapping while the current request is still computing the (potentially slow) target graph. The write is now fire-and-forget: failures are logged as warnings but do not fail the request, since the mapping is a performance optimization, not a correctness requirement.
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Summary
BuildDescription → treehash) from after graph computation to before it, so concurrent/subsequent requests can resolve the mapping while the current request is still computing the target graph.Putis negligible compared to graph compute — the win is in timing, not concurrency.Test plan
bazel test //orchestrator/...passesmake buildpasses