APC

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Alternative PHP Cache (APC) is a free, open source (PHP license) framework that heavily optimizes and tunes the output of the PHP bytecode compiler and stores the final, compiled result in shared memory, which leads to faster runtime execution since source files do not need to be recompiled. It also maintains a shared, in-memory bytecode cache which allows the server to re-use the compiled code rather than having to retrieve the opcodes from a disk cache, resulting in a bigger performance boost.

Synonyms:

APC Cache
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