Benchmark beta
Add Benchmark

#	Hashrate	1 thread	Size	Duration	CPU	Threads	Version
1	2169.35	542.34	1MH	460.968	1	4	6.18.0
2	1887.37	471.84	1MH	529.838	1	4	6.8.1
3	1190.67	297.67	1MH	839.865	1	4	6.18.0