PHP: Speed Question

[jollyfactory]

Hi.. I am programming my biggest application (it's about 300kb of just code) and I have a question on speed.

Well I have about 30% of my code in "users.php" and 30% in "index.php".

To clean things up a little, I have thought about placing all the code into one file "index.php".

THe pages all execute if statements on urls like
index.php?action=category
or
users.php?action=control_panel

I can easily amalgamate the two files, but I was wondering if this would cause any severe server lag or loss in speed.

I have tried this on my own system and have had experienced no changes in speed but I was wondering what would happen on a larger scale.

Thanks :) Any help is appreciated.

[scoutt]

it would really all depend on how many people are on that page. if you combine all of your code to 1 file than you will have problems if mass people view it at once. keep what you got and in fact you could make it smaller by making more files.