I find it scary that http://code.google.com/speed/article...izing-php.html doesn't even bother to mention variable optimization with PHP Garbage Collection, which is a huge waste of cpu ticks, especially in frameworks (especially MVC) - due to the fact that all objects are considered passed by reference as of PHP5.

sigh.

well, at least the newer php devs will find something important :o

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Senior Software Engineer at CityVille