Three optimizations in the proxy cache hot path:
- Pre-build cacheIgnoreSet map once at Proxy creation instead of
per-response. Eliminates map allocation + linear scan per cached
response.
- Compute cache key once per request via computeCacheKey() closure.
Previously buildCacheKeyHash was called up to 5 times per request;
now computed on first access and reused.
- Pool UpstreamTiming objects with sync.Pool. Eliminates one heap
allocation per proxied request.
xfy
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