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238 points hundredwatt | 1 comments | 18 Nov 24 21:47 UTC | HN request time: 0.203s | source

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mmastrac ◴[19 Nov 24 02:36 UTC] No.42179600[source]▶

Hyperfine is a great tool but when I was using it at Deno to benchmark startup time there was a lot of weirdness around the operating system apparently caching inodes of executables.

If you are looking at shaving sub 20ms numbers, be aware you may need to pull tricks on macos especially to get real numbers.

replies(3): >>42180391 #>>42182037 #>>42182986 #

1. maccard ◴[19 Nov 24 13:07 UTC] No.42182986[source]▶

>>42179600 #

Not being able to rely on numbers to 20ms is pretty poor. That’s longer than a frame in a video game.

Windows has microsecond precision counters (see QueryPerformanceCounter and friends)

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Hyperfine: A command-line benchmarking tool