XCache is a open-source opcode cacher, which means that it accelerates the performance of PHP on servers. It optimizes performance by removing the compilation time of PHP scripts by caching the compiled state of PHP scripts into the shm (RAM) and uses the compiled version straight from the RAM. This
... [More] will increase the rate of page generation time by up to 5 times as it also optimizes many other aspects of php scripts and reduce serverload. [Less]
eAccelerator is a further development of the mmcache PHP accelerator and encoder. It increases the performance of PHP scripts by caching them in a compiled state, so that the overhead of compiling is almost completely eliminated.
Turck MMCache is a free PHP accelerator, optimizer, encoder, and dynamic content cache. It increases performance of PHP scripts by caching them in a compiled state, so that the overhead of compiling is almost completely eliminated. It also uses some optimizations for speeding up PHP scripts'
... [More] execution. It typically reduces server load and increases the speed of PHP code by 1-10 times. It is tested with PHP 4.1.0-4.3.3, and Apache 1.3 and 2.0 under Linux and Windows. [Less]