[allan87]

But overclocking away, speed won't matter much if you use USB 2 memory sticks no, because the rely on almost the same memory technology as sdcard's. Move to a good USB 3 stick (closer to SSD technology) or a harddrive and database operations will be insanely faster, as high or higher than the numbers we see with f2fs.

Are you saying that, as a class, usb3 sticks have faster memory? If not, I don't see how there would be a benefit over USB2, as the pi' USB interface is usb2, so the faster interface would not help.