[19:15:28] <ori>	 very good read, even if its applicability to PHP is limited due to its single-threaded execution: https://github.com/dvyukov/perf-load
[19:16:23] <ori>	 the author recently contributed latency/parallelism profiling support to `perf`: https://web.git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git/commit/?id=32ecca8d7a3e2400805f8b5564a1b07e05cfcd54