For people developing on Windows, it may be beneficial to create a ramdisk.
The free version allows a 4gb drive to be created. Obviously you need the free system RAM. Other very inexpensive paid versions include more options and functionality.
I have been using it to handle my Chrome temp files and cache, but it seems to work well to build on as well. It can be used just like any other Windows folder and saves data to HD on shutdown.
I do not have any benchmarking, but if anyone does, please share.