I get just 165MH/s on HD7850
Were Smelter as advanced as sgminer and company, many problems could be diagnosed by plain screenshot
Try to play with worksize, change '-W 64' in .cmd file to -W 128 or 256, select the best value, lower memclock and start to raise core clock. Keep an eye '5s:' speed, it catches up quickly.
And I get ~271MH/s on it.
Something new?
Why don't you release some full speed version where you get a percentage?
We are more or less at par with Wolf0, he is obviously better at OpenCL, I think I can show a trick or two at math. Our miners are roughly equal. I spared my best kernel to throw Smelter into wildness of buggy drivers, weird software, rare GPUs, newbie users and other real-life issues. When all it will be over, Smelter will be mature miner, ready to make money - with other algorithms. Sadly, this move devastated profits on Vanillacoin for OpenCL developers, at least until next breakthrough with AES-like kernels.
Nope, screenshot is from 03/16 (NSFW):
https://ottrbutt.com/miner/whirlpoolxwolf-03162015.pngNote that it's a 270X, not a 7850 - while they share the same core, the 270X is better binned, and has slightly more shaders - 1280 vs. 1024.