Add Server-Timing instrumentation and optimization plan#322
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Add Server-Timing instrumentation and optimization plan#322
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Introduce RequestTimer for per-request phase tracking (init, backend, process, total) exposed via Server-Timing response headers. Add benchmark tooling with --profile mode for collecting timing data. Document phased optimization plan covering streaming architecture, code-level fixes, and open design questions for team review.
Introduce RequestTimer for per-request phase tracking (init, backend, process, total) exposed via Server-Timing response headers. Add benchmark tooling with --profile mode for collecting timing data. Document phased optimization plan covering streaming architecture, code-level fixes, and open design questions for team review.
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@prk-Jr Have you seen this? https://www.fastly.com/blog/profiling-fastly-compute-applications I don't think we need to make changes to profile |
RequestTimer and Server-Timing header were premature — WASM guest profiling via profile.sh gives better per-function visibility without runtime overhead. Also strips dead --profile mode from benchmark.sh.
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Summary
RequestTimer(crates/common/src/request_timer.rs) that tracksinit,backend,process, andtotalphases and emits aServer-Timingresponse headermain.rsandpublisher.rsfor the publisher proxy hot pathscripts/benchmark.shwith--profilemode to collect and report Server-Timing data, TTFB/TTLB stats, and load test resultsOPTIMIZATION.md— phased optimization plan for team review covering:stream_to_client()streaming architecture (needs spike for#[fastly::main]compatibility)Test plan
feat/optimize-tsto stagingBENCH_URL=<staging-url> ./scripts/benchmark.sh --profileand verify Server-Timing headers appear