notes/systems
all — 100.0% of samplesall__libc_start_main — 96.2% of samples__libc_start_main[unknown] — 3.4% of samplesmain — 96.2% of samplesmainserver_loop — 70.4% of samplesserver_loopgc_cycle — 15.0% of samplesgc_cycleinit_tables — 10.0% of sampleshandle_request — 56.6% of sampleshandle_requestaccept4 — 13.4% of samplesaccept4mark_roots — 15.0% of samplesmark_rootsparse_headers — 21.4% of samplesparse_headersjson_encode — 19.2% of samplesjson_encodemalloc — 15.2% of samplesmallocmemcpy — 8.6% of samplesmemcpystrlen — 4.8% of samplesarena_alloc — 9.6% of samples

perf record -F 99 -g — 30s, one busy worker. Hover a frame.

Working notes on performance, networking, and the tools for looking at them.

2026
2025