Memcache is a high-performance, distributed memory object caching system. The Bitnami LAMP Stack also includes the PHP memcache extension. Read more about APC and how to use APC with PHP and Bitnami. Make sure your APC cache has enough memory and a long TTL. APC provides a framework for opcode caching, thereby speeding up PHP applications without needing any code changes. Usually, when a PHP script is executed, the PHP compiler converts the script to opcodes and then executes the opcodes. The Bitnami LAMP Stack includes APC, a popular PHP bytecode cache.
