From owner-freebsd-questions  Fri Mar 29  9:27: 4 2002
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Date: Fri, 29 Mar 2002 21:21:03 +0500 (YEKT)
From: Ilia Chipitsine <ilia@cgu.chel.su>
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To: questions@FreeBSD.ORG
Cc: hackers@FreeBSD.ORG
Subject: perfomance and regular expressions
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Dear Sirs,

I'm currently implementing a program which will run thousands and
thousands times. It uses regular expressions.

something really simple, like

regex_t re;
regcomp(&re,"^[0123456789abcdefghijklmnopqrstuvwxyz]{1,8}$",
                                         REG_EXTENDED+REG_ICASE);
return(!regexec(&re,name,0,0,0));

so, questions are:

1) is it faster to "compile" regex once and load it from file every time
   program starts ?

2) how to store in a file data of type "regex_t" ??

Regards, (Наилучшие пожелания)
Ilia Chipitsine (Илья Шипицин)


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