| Subject: | POE delays and Tk cause enormous use of CPU-time |
When you use POE, at least two delays (e.g. for timers) and also Tk your
perl-script ueses much too much CPU-time (on my machine - Athlon XP
2200+ with two 1-second-delays up to 100%).
Without using Tk the script works just fine and uses about 0-1% CPU.
An older version of poe (libpoe-perl of sarge, version 0.29) work just
fine, so I'm using these very old versions to avoid the problem.
For a short script that explains the problem see
http://m19s28.vlinux.de/estel/debian/poe.
When using strace you recognize that gettimeofdate() is called by POE
several times. I guess that is quite normal as POE provides support for
delays. However, without using Tk POE calls gettimeofdate() maybe about
10 times per second, but running the script and using Tk it is
impossible to count.
If you use longer intervalls for you delays the script uses less CPU,
but still too much.
I've also reported this bug to the responsible debian maintainer months
ago (see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=345544), but
no answer or solution up to now.
Thank you for your help,
Michael Hartmann