is HDR processing affected by faster memory card?

I tried searching the forums but I could not find an answer.

I am currently using a class 10 Transcend memory card. I would like to know whether HDR processing speed will be affected by a faster memory card, say, those new cards with UHS-1 support.

Will the speed gain be very significant?

Thanks!

P.S. An alternative would also be on how to turn-off HDR as quickly as possible.. I currently have it as a custom in the function setting, but I would have to scroll across Auto-6HDR before I can turn it off.