PHP Accelerators

A PHP accelerator is a PHP extension designed to improve the performance of PHP-based software applications.

The way these PHP accelerators work is by caching the compiled bytecode of your human-readable PHP. Normally, your PHP code is compiled and then executed at runtime, but these tools cache the compiled code, saving the expense of compiling it and thus generally saving you a bit of CPU at the cost of some increased memory usage.

So what PHP acceleration can do is make your PHP run more quickly, roughly half the time. To the user it is a combination of page generation time, network latency, and page rendering time.

In the PaaS, the most popular accelerators are used:

APC
Xcache
eAccelerator (works with PHP 5.3 and 5.4 only)
ZendGuardLoader (works with PHP 5.3 only)

To activate the accelerator, follow the instructions:

1. Click the Config button for the server in your environment.

2. In the etc folder, open the php.ini file.

3. Uncomment one of the Accelerators:

1
2
3
4



extension=apc.so   
extension=eaccelerator.so   
extension=xcache.so   
extension=ZendGuardLoader.so

4. Also, here you can make all the settings necessary for your module.

5. Save the changes and restart the node.

That’s all. The chosen PHP accelerator is now activated.

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