Which PHP Optimizer do you use?

APC, XCache, eAccelerator etc.

I currently use APC but have been reading some great comments about XCache so I thought I should ask what webmasters here used.

xcache never ran right for me on 2 different servers.
i use eac now with good results

Have you tried APC as well? I noticed that APC has more complete requests than other PHP optimizers.

PHP Accelerators : APC vs Zend vs XCache with Zend Framework - Mike Willbanks : getting into the mind of a php developer.

nope. i also dont use the zend framework

I personally use xcache and memcached. I also prefer not to use apache

Using XCache with filecache! So fast!

I use APC because it's easy to keep up with updates as it's in pear