Re: [PHP-DEV] Re: [PHP3] Re: [PHP-DEV] Re: [PHP3] PHP Speed Optimization From: Andi Gutmans (andi <email protected>)
Date: 04/24/00

At 01:53 AM 4/25/00 +0500, Faisal Nasim wrote:
>| Say you have 30 user-built functions in *one* file, 200 lines of code.
>| Depending on your code base/version, if those are called 10 times per
>page,
>| you need to include that code for the parser (file call), and
>| then as you go through the page, it substitutes out the function code....
>| plus you've added 20 useless functions of overhead for *every*
>| parsed page. (Hence, the speed differences between 3 and 4, and the
>| problem with using functions in 3. They *will* bog your execution
>| down)
>
>Its there parsed once sitting in the memory, it doesn't actually
>substitute the function contents with the function call and then
>process is as if it was embedded in the code itself! Its done
>through a smart method.
>
>|
>| Lots and lots of overhead in that. If you can strip excess functions
>| out, and speed is your goal, by all means, dump them over the side
>| as fast as you can, and explicitly code using PHP's internal
>| functions. Try two or three variants on your code, to see if, for
>| example, you could get a faster result from a printf or an echo,
>| a faster loop by only testing (if/case) under a smaller set of
>| circumstances, and, if you can, avoid *ever* using requires or
>| includes....
>
>Seems like you have mixed C with PHP. PHP functions don't
>have overhead like C does (unless they are inline, the overhead
>is negligible, but its there!)

PHP function calls have overhead similar to the way C does. The parameters
are passed etc. etc..

Andi 

---
Andi Gutmans <andi <email protected>>
http://www.zend.com/

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