I downloaded a new build and ran a speed test. I got a fast build ( did not say fast math )
. here is my comparisons
2.49 32 bit 4 min 30 sec
2.49 64 bit 2 min 51 sec
2.58 64 bit 1 min 10 sec
2.614 fast 64 bit 43 sec
I use Blender render and was happy to find this Build it is my new favorite and I wanted to share