Re: Packaged perl slow?
On Fri, Sep 24, 2004 at 08:59:49PM +0200, Francesco Paolo Lovergine wrote:
> > I've been tracing a problem with a Perl Application I use (kwiki), and
> > I'm having trouble understanding why it is so slow.
> Did you try different kernel versions?
Hmm... "yes". Meaning, on a different machine (AMD Athlon(tm) XP
1600+) with several different kernels (all of them 2.6) it doesn't make
much of a difference. For now I can't take the original machine down
for a kernel change.
$ time ./index.cgi > /dev/null
Looking at the profileer, it's spending an awful lot of time here:
25.1 0.260 0.000 95 0.0027 0.0000 utf8::SWASHNEW
Looking at the documentation, perlunicode has this to say:
Interaction with Locales
Use of locales with Unicode data may lead to odd results. Currently,
Perl attempts to attach 8-bit locale info to characters in the range
0..255, but this technique is demonstrably incorrect for locales that
use characters above that range when mapped into Unicode. Perl's Uni-
code support will also tend to run slower. Use of locales with Unicode
but I'm not sure what that means. Is it saying "don't define LC_*
Much of the time is start up time. Someone else suggested using
modperl, but kwiki leaks memory in modperl. There are sure some
Given that people on other architectures report better performance with
equivalent hardware and the same version of perl, I was wondering if
there's something about Debian's Perl is compiled that might make it
slower in this scenario.