[tz] localtime_r multiple times slower for Europe/Moscow timezone
eggert at cs.ucla.edu
Wed Jan 11 02:40:44 UTC 2023
This is a known performance issue in glibc; see:
It'd be nice if someone found the time to fix it; perhaps that could be you?
The bug depends on how the TZif files are built. On my Fedora 37
platform if you build with 'zic -b fat' Europe/Berlin is way faster than
Europe/Moscow, but if you build with 'zic -b slim' it's the other way
round. Obviously performance shouldn't be that much affected by whether
TZif files are fat or slim.
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