HDR-histogram tail-latency bench suite + BENCH.md#77
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joaquinbejar merged 1 commit intomainfrom Apr 25, 2026
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Six new harness=false bench binaries under benches/order_book/*_hdr.rs: add_only, cancel_only, aggressive_walk, mixed_70_20_10, thin_book_sweep, mass_cancel_burst. Each records per-sample latency into hdrhistogram::Histogram and emits p50 / p99 / p99.9 / p99.99 + min / max + sample count to stdout. Coexists with the existing Criterion benches. Adds hdrhistogram ^7 as a dev-dependency, a make bench-hdr target that runs all six in series, and BENCH.md at repo root with methodology (warmup, closed-loop disclosure, run conditions, sample counts) plus actual headline numbers from a single Apple M4 Max run. Closes #56.
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Summary
Six new
*_hdrbench binaries underbenches/order_book/recordingper-sample latency into
hdrhistogram::Histogramand emittingp50/p99/p99.9/p99.99+ min / max. Coexists with the existingCriterion benches.
make bench-hdrruns all six.BENCH.mdat therepo root carries methodology, run conditions, and an honest headline
table from a single M4 Max run with closed-loop service-time
disclosure.
Closes
Closes #56.