Disk Read

[losang]

I was wondering if anyone can offer advice on the cost of executing disk reads. The particular example I have in mind is as follows.

Each php page on my site includes a header file header.php. So each time a page is loaded the file must be read from the disk and inserted into the script. What is the cost of this disk read vs. including the file contents directly in the scripts?

Thank you,

losang

[Anon]

Not enough that it would make any difference (unless you are a sysadmin at Yahoo!)

Understand that if that particular file or page gets hit alot, it will generally be in the system disk cache.

-Ben