⚡ Bolt: Optimize sensitive headers parsing#160
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This change optimizes the L7 HTTP request/response parsing by caching the sensitive headers map. Previously, `ParseHTTPRequest` and `ParseHTTPResponse` would parse the `flags.SensitiveHeader` string (splitting by comma and building a map) on every single request. This is a hot path for the agent when L7 tracing is enabled. I introduced a `getSensitiveHeaders()` helper that caches the map using a `sync.RWMutex` and double-checked locking, only rebuilding the map if the underlying flag string changes (which is rare, mostly in tests). Benchmarks show significant improvement: - `ParseHTTPRequest`: ~11.6% faster - `ParseHTTPResponse`: ~20.7% faster This reduces allocations and CPU usage in the critical path of L7 event processing.
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Optimize sensitive headers check in L7 tracing to reduce allocations in hot path.
PR created automatically by Jules for task 3947344019158851794 started by @blue4209211