Re: [tz] localtime_r multiple times slower for Europe/Moscow timezone

This is a known performance issue in glibc; see: https://sourceware.org/bugzilla/show_bug.cgi?id=15943 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.