I just set up the ramdisk properly. In the case of benches, I consider it a bit of cheating, it doesn't reflect 100% real world performance. But for things like gaming, where you may need to reload a level several times in a row, it can be a huge help. Just use this, it's free for 90 days or even more if the beta continues, it's fully functional:
I recommend Fancycache for Volumes, if you have partitions like I do.