Turck MMCache is a PHP Accelerator, Optimizer, Encoder and Dynamic Content Cache. It increases performance of PHP scripts by caching them in compiled state, so that the overhead of compiling is almost completely eliminated. Also it uses some optimizations for speed up of PHP scripts execution. Turck MMCache typically reduces server load and increases the speed of your PHP code by 1-10 times. It has been tested with PHP 4.1.0 - 4.3.2 under Linux and Windows with Apache 1.3 and 2.0.
Session locking (like "files" sessions do), dynamic content caching and Zend Optimizer support were implemented.