eAccelerator is a free open-source PHP accelerator, optimizer, and dynamic content cache. It increases the performance of PHP scripts by caching them in their compiled state, so that the overhead of compiling is almost completely eliminated. It also optimizes scripts to speed up their execution. eAccelerator typically reduces server load and increases the speed of your PHP code by 1-10 times.

eAccelerator stores compiled PHP scripts in shared memory and executes code directly from it. It creates locks only for a short time, while searching for a compiled PHP script in the cache, so one script can be executed simultaneously by several engines. Files that can’t fit in shared memory are cached on disk only.

Installing From Source

unpack it by ::

$ sudo tar -xjvf eaccelerator-0.9.5.3.tar.bz2
$ cd eaccelerator-0.9.5.3/

Linux User Read README file

Windows User Read README.win32

Compile and install it with ::

./configure
make
sudo make install
make test

Add the below line to php.ini file

extension=eaccelerator.so

Check phpinfo()  and conform the module eAccelerator is loaded