From: Eric Hodel <drbrain@...7.net>
Date: 2006-09-05T08:15:38+09:00
Subject: Re: Compiling Regexp only once

On Sep 4, 2006, at 5:15 AM, singsang wrote:

> Writing some httpd logfile pre-processing (splitting it up, getting
> already some basic numbers), I think that I should compile the Regexp
> for the logfile entry only once.

You should benchmark, I expect you will find you made matching slower.

> So my guess is that I should have perhaps a class LogFormat that holds
> this as a class variable or a class constant. Below I use a non-tested
> regular expression that is not complete yet.
>
> class LogLine
>   # ...
>   ip, rfc931, user, day, month, year, offset =
> line.match(LogFormat.regex)
>   # ...
> end

#match is the slowest way to use regular expressions.

[ruby-talk:204747]

-- 
Eric Hodel - drbrain@segment7.net - http://blog.segment7.net
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