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Description
Switched compiled chain hashing flow to use precomputed hash values where available, instead of recalculating full hashes repeatedly. More info available on RFC.
Testing & Reproduction steps
Added/updated tests in respective test files to validate behaviour:
Performance validation
Captured pprof before vs after this change with 4000 watches on one service.
Comparison shows reduced time spent in hashing-related work on the compiled chain path, with corresponding CPU improvement in that scenario. Results are shared separately.
Links
PR Checklist
PCI review checklist
I have documented a clear reason for, and description of, the change I am making.
If applicable, I've documented a plan to revert these changes if they require more than reverting the pull request.
If applicable, I've documented the impact of any changes to security controls.
Examples of changes to security controls include using new access control methods, adding or removing logging pipelines, etc.