I haven’t measured it but 10ms seems like ages. Anyway, it’s working fine. 320 kbps mp3s and radio have no problem while going trough UI. Only C/C++ can make it faster (or a hydra module 8) ).
I’m not using RLP for graphics. But it would be great (fast). The only thing that’s keeping me from doing it is that I didn’t documented myself on using C++ with RLP.