If you are running off a fast SSD for storage I'm not sure that the RAM disk method will get you noticeable perf improvements; but I don't have any data for this so appreciate any corrections.
That doesn't mean it necessarily makes a difference. If your bottlenecks are CPU speed and disk latency, an SSD will remove 99% of the time spent waiting for disk, and even an infinitely fast ramdisk can only give you another 1%.