[pLog-svn] caching

[Jon Daley]

I believe we were pointed to this link by someone (Ben?) a while ago.
http://phplens.com/lens/php-book/optimizing-debugging-php.php

I finally got around to reading, and came across a couple interesting 
(non-intuitive, at least until you are told about them)

Incrementing an undefined local variable is 9-10 times slower than a 
pre-initialized one.
> Initialise all variables before use.

> Dereference all global/property variables that are frequently used
> in a method and put the values in local variables if you plan to
> access the value more than twice.


Methods in derived classes run faster than ones defined in the base class.
> Try placing frequently used methods in the derived classes.


In PHP 5, all objects are passed by reference automatically, without the 
need of an explicit & in the parameter list. PHP 5 object performance 
should be significantly faster.




**************************************************************
*     Jonathan M. Daley     *     You are only as wise as    *
*   jondaley at snurgle.org    *   others perceive you to be.   *
* www.snurgle.org/~jondaley *               -- M. Shawn Cole *
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