Need a good traffic script.
 

I'm looking for a good trade script. I tried already a couple, but they all slow down my site with seconds.
Is there a good one that won't slow down my site that much and which i can install on my own server.
Script must count unique visitors too.
The site receives about 50.000 uniques and 150.000 pageviews daily.

In that case buy ATX from arrowscripts