add_*_vars() speed-up

Hi Andrei,

I don't see AUTH_USER, HTTPS..., CLIENT_CERT, HTTP_HOST, REQUEST_LINE,
SERVER_URL.

May be not all of them necessary and available in apache, but AUTH_USER,
HTTPS are required for PHP.

Thanks. Dmitry.

-----Original Message-----
From: Andrei Zmievski [mailto:andrei@gravitonic.com]
Sent: Friday, March 17, 2006 1:47 AM
To: php internals
Subject: [PHP-DEV] add_*_vars() speed-up

Based on Rasmus's profiling efforts, we have determined that
add_cgi_vars() and add_common_vars() are taking a lot of time. Having
taken a look at their implementation it seems that they are
doing some
unnecessary stuff, like creating a temporary table, filling it with
entries and then calling ap_overlap_tables() which is supposed to
overlap it over r->subprocess_env. But r->subprocess_env
contains only
a couple of entries by the time add_common_vars() is called, so it
would be faster to add entries to it directly. Also,
add_cgi_vars() was
doing a subrequest in case r->path_info was present, which is
completely unneeded for PHP as Apache module.

The solution is to duplicate the functionality of these functions in
mod_php5.c which is what the attached patch does. It also sets
PATH_TRANSLATED in r->subprocess_env directly, so
sapi_apache_register_server_variables() does not need to special case
it.

Please look it over and test. It seems to give about 7% boost on
average.

-Andrei