Interesting! I can confirm that I also see this in Ubuntu 22.10. However, I do NOT see it on macOS 13.1. Walt On Wed, Jan 11, 2023 at 12:15:53AM +0100, Benjamin Drung via tz wrote:
Hi,
a Ubuntu user has been reporting in https://launchpad.net/bugs/868395 that the Europe/Moscow timezone is multiple times slower than other timezones. Here is the example bug.c code:
``` #include <time.h> #include <stdio.h>
int main() { time_t t = time(0); int i; struct tm result; for(i=0; i < 10000000; i++) localtime_r(&t, &result); puts(ctime(&t)); return 0; } ```
Compile and run this code:
``` gcc -o bug bug.c time TZ=Etc/UTC ./bug time TZ=Europe/Berlin ./bug time TZ=Europe/Moscow ./bug ```
The result on my machine is that Etc/UTC, Europe/Berlin, and other timezones take around 250 to 400 ms, but Europe/Moscow takes 1200 ms. The result is the same when running in a Debian unstable, Ubuntu 22.04 (jammy) and Ubuntu 23.04 (lunar) chroot.
Is that a bug? If yes, is that a bug in glibc?
-- Benjamin Drung Debian & Ubuntu Developer