Switch from IIS 7.5 to Apache

Question

I am concidering making a switch from IIS 7.5 to Apache.
I have already tried running PHP (FastCGI) on nginx but the performance was extremely bad compared to IIS 7.5

Because I am unable to find performance benchmarks (PHP) between IIS and Apache on Windows, I am asking you for your experience/feedback.
I use WinCache on IIS, and I have used eAccelerator on Apache. What about APC?

The switch will be for performance gain only.

Update: I have tried running Apache with mod_php & mod_apc. But the website felt noticeably slower than with IIS. Is this normal? The application is fully APC supported.

Answer 1

APC is going to be included in PHP 6, and I'd guess it has been chosen for good reason :) allthough it performs very well, but not as good as eAccelerator. And it has compatability issues with Zend Optimizer.

• Source: apc vs eaccelerator vs xcache