From: Eric Anderson <eric@...>
Date: 2004-12-13T01:27:35+09:00
Subject: Re: fsync on stdout for mod_rewrite

Dominik Werder wrote:
> clear last_request after the puts so that not accidentially an old 
> value  can be given to apache.. maybe overcautious, anyway.. :)

last_request stores the last request for the next request. It is a basic 
caching mechanism. For every web request this script is called a couple 
of times because of the way mod_rewrite works. Therefore I want to cache 
the most recent answer so I don't end up with a bunch of SQL queries for 
each request. Also if a site is popular it will cut down on the number 
of SQL requests although a more extensive caching would be better for 
that. If last_request == request then we give the same answer as the 
last request.

Eric