raspberry pi zero and SLOW USB HID

[Wojciech Puchar]

i have 1000 request per second on PC. and it's enough.

but at most 100 on raspberry pi.

Our interface wasn't designed for high data transfers, just to be easier 
usable in windoze (no need for driver installation).

This raspberry pi setup is one of a kind hardware for special use. not for 
mass production.

but the problem is that on raspberry pi it's 10 times slower to do hid 
ping-ponging. and it's too slow.