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Last Modified: 10.10.2012
A key method that would allow to reduce the processor load is using a PHP pre-compiler.
Currently, APC (Alternative PHP Cache) is the most popular and developing product. We expect to see it included in the PHP6 package. We recommend APC, or eAccelerator as a quality and proved alternative. Remember to reserve sufficient memory for compiled PHP scripts. 16 to 24 MB is usually enough, but you can increase it to 32 MB on the safe side, to account for Control Panel scripts. The memory is shared between the web server processes which means that it will be reserved only once.
To reduce memory eaten by the web server processes, remove all the unused PHP modules at the compilation or run time.
This option is not available for Windows platforms.