Benchmark beta
Add Benchmark

#	Hashrate	1 thread	Size	Duration	CPU	Threads	Version
1	1474.79	737.39	1MH	678.064	1	2	6.21.3
2	1424.02	712.01	1MH	702.235	1	2	6.15.2
3	1909.14	477.29	1MH	523.795	1	4	6.18.1
4	669.65	334.82	1MH	1493.319	1	2	6.16.2