I can't say CPU doesn't matter... running those benchmarks with new peaking enabled absolutely kills memcpy.
I can confirm this. I've just tried the card benchmark with Global Draw on (All features enabled) and off like you suggested, a1ex. And with GD I've got about 1/3 of the writing speed that I've got without GD. At the end my 600D actually overheated!
I hope that helps you a little bit, because I'd really like to see how much DNG frames you'll get out of our cameras in the future.
May I ask if you have already found a way to edit the LV_Rec images? I know that things like this need time and I don't want to push you. I am just curious. And I'm still very excited about this feature. Are you more pessimistic or optimistic regarding the development?
I apologize if I'm bothering you. Just don't answer if you don't want to
Anyway, thanks a lot for what you've already done. I really appreciate your work! ML is fantastic
Also I would like to help you, but since I'm only familiar with Java, I guess there's no way I can help you apart from testing?