test-codeowners

Measures getCodeOwnersForFilename, the per-test-file owner resolution Test Optimization runs across a suite: a reversed walk of the parsed CODEOWNERS entries testing each pattern's regex against the path until one matches. Entries come from the real parser reading a committed snapshot of this repo's own .github/CODEOWNERS (anchored / extension / ** rules a big monorepo carries), so the benchmark exercises a meaningful worst case rather than a synthesized file. It runs lookups over a corpus of paths shaped like this repo's files (matches at varying depths plus a full-scan miss); each pass uses a fresh cache view so every lookup is a real regex scan.