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php Programming Glossary: performancesOptimizing Kohana-based Websites for Speed and Scalability http://stackoverflow.com/questions/1260134/optimizing-kohana-based-websites-for-speed-and-scalability probably help here too. First of all when it comes to performances there are many aspects questions that are to consider configuration.. generally tend to forget those when trying to optimize for performances that are requested very often having them in cache for a couple.. Benchmark of PHP Branches 3.0 through 5.3 CVS . Note that performances is quite a good reason to use PHP 5.3 I've made some benchmarks..
Php $_REQUEST vs $_GET and $_POST http://stackoverflow.com/questions/1924939/php-request-vs-get-and-post Either way there will not be much of a difference about performances the difference will be negligible compared to what the rest..
When to pass-by-reference in PHP http://stackoverflow.com/questions/2157799/when-to-pass-by-reference-in-php I wouldn't use a reference. And if you're thinking about performances you should read this recent blog post Do not use PHP references..
What's the prefix for binary in PHP? http://stackoverflow.com/questions/2507208/whats-the-prefix-for-binary-in-php do that each time the script is executed is quite bad for performances ^^ Instead it's really a better solution to write your values..
PHP Application Flow Graph (or function call graph) http://stackoverflow.com/questions/2719734/php-application-flow-graph-or-function-call-graph don't install it on a production server it's quite bad for performances ^^ Then you can use its profiling features to generate a .cachegrindout..
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