Benchmark beta
Add Benchmark

#	Hashrate	1 thread	Size	Duration	CPU	Threads	Version
1	3014.80	274.07	1MH	331.697	1	11	6.19.1
2	2998.13	230.63	1MH	333.541	1	13	6.21.2
3	3650.97	228.19	1MH	273.900	1	16	6.20.0
4	2155.96	165.84	1MH	463.831	1	13	6.21.2