xmrig is no longer a clone of Wolf0 miner, they really provide their own code with own optimizations.
Including some i found 6 months ago, but not all, so i don't think they hacked my miner, just they knew where to look for performance, as TeamRed hinted me, and i hinted SRB. Experienced devs facing the same problem find the same solution, normal.
Online is the 0.33b-y* A lot less tested than a regular version, i hope there's no bugs out there
*
Fees lowered back to 0.9% on all algos, as I'm no longer 20% faster than the reference code
* More
hybrid, so should eat a bit more CPU
* Bad shares on Heavy fixed, at least i had zero during my 5-hour test session
* Light optim ~2% for HD7000 is backported to HD6000
* It was more stable on my rig, but i'm doubting of such observations

That's the standalone .exe on Github, as for the previous b-x