[WINDOWS] Performance issues

Hi there,

I just installed the 3.0.2 gallery on my WHS, but it's quite slow. Here are typical benchmark figures:

Kohana Loading 1 0.270 1.51MB
Environment Setup 1 0.247 1.07MB
System Initialization 1 0.774 1.80MB
Controller Setup 1 0.048 0.07MB
Controller Execution 1 2.017 2.36MB
Total Execution 3.109 5.75MB

System Init usually is somewhere around ~1s, while Controller Exec takes between 1 and 2 seconds.

Here are my specs (all new and fresh install):
Windows Home Server (v1) on HP DataVault X311 server with 2x 2TB hard drives
Using built-in Windows IIS (couldn't get Apache 2.2 to work with PHP and IIS is recommended for WHS due to performance reasons)
PHP 5.2.6 (installed via WHSPHP AddIn, using default settings)
MySQL 5.5.15.0

The gallery directory is NOT accessed via any network link like usually on a WHS, but directly (another folder on D:\).
Somebody on the forum mentioned that it's important to have 127.0.0.1 mapped to localhost in the Windows HOSTS file, which is the case.
I also tried settings like skip-networking in the MySQL ini file to circumvent any TCP/IP, no success.
I'm running out of ideas...