ccminer SP_ release 11 with 750ti average (out of 6 cards):
X11: 2870 Khash
X13: 2280 Khash
The Ctrl+C bug is still present.
I also noticed that while mining at NiceHash I now see a green tick below the extranonce subscription column. Previously it was a red cross. Is this related to the optimisation of ccminer?
polanskiman--
The hash improvements on X11, X13, Xetc, are due to DJM34, sp_, Epsylon3, and tsiv. The extranonce compliance and several non-kernel functional improvements are due to Epsylon3; his focus appears to be more on improving control functions.
What do you mean by the "control-c bug"? -scryptr
I am referring to SP_'s release 11 of ccminer. I know the devs who contributed to ccminer... Thanks for the lesson though

DJM34 was the latest dev to have worked and produced a stable release with significant improvements. FYI the very latest improvement of ccminer was done by SP_ (~ +200 Khash) - Still beta as I understand it though.
In order to quit ccminer you can proceed by pressing Ctrl+c. In SP_'s release of ccminer there seems to be a bug where Ctrl+c will lead to the crashing of ccminer.
For some reason ccminer never crashed here after ctrl-c.