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   Tony Finch (fanf@mendeddrum.org)'s status on Monday, 29-Jul-2024 08:32:24 JST Tony Finch

   on my blog!

   https://dotat.at/@/2024-07-28-tolower-avx512.html

   tolower() with AVX-512

   i got nerdsniped and this is the result

   • Embed this notice
     Haelwenn /элвэн/ :triskell: (lanodan@queer.hacktivis.me)'s status on Monday, 29-Jul-2024 08:32:22 JST Haelwenn /элвэн/ :triskell:

     in reply to
     @fanf `tolower()` is the kind of function which can benefit from being inlined so maybe should have few adjustments there.
     
     Ran on a AMD Ryzen 7 3700X so no AVX-512-BW sadly, using linux 6.6.21 + musl 1.2.5, (copy)tolowerin being musl's straightforward isupper+tolower functions inlined rather than linked to.
     All compiled with Clang 18 and `-02 -march=native -mtune=native` in the CFLAGS.
     vectolower.png
   • Embed this notice
     Tony Finch (fanf@mendeddrum.org)'s status on Monday, 29-Jul-2024 08:38:51 JST Tony Finch

     in reply to

     • Haelwenn /элвэн/ :triskell:

     @lanodan yeah i deliberately prevented the compiler from inlining because i wanted to be sure i was measuring what i thought i was; the versions in BIND are inlined .. . i should add a few sentences about the benchmark methodology, oops, forgot!

     Haelwenn /элвэн/ :triskell: likes this.