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regexec() performance problem

From: Jan Fedak
Subject: regexec() performance problem
Date: Tue, 23 Apr 2002 10:48:43 +0200
User-agent: Mutt/

Hi guys.

I have serious performance problems with regexec(). I attach a short
program that will try to match a regular expression against ~130K text.
On my computer I never had enough patience to wait for it to complete. 

I know that in this particular case I could use simple strstr() and have
my job done in no time but still I wonder whether some profiling
wouldn't reveal ways to make glibc implementation of regular expressions

I didn't do much research, I just quickly looked at it in debugger and I
noticed that quite a lot of time is spent in functions for multibyte
characters -- just my idea where performance problems could come from...

Thanks for your work and any response.


Jan Fedak                                         mailto:address@hidden  
                Linux - the ultimate NT Service Pack.  

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