Miner With Threads aka Parallel Mining

[manuelbarbas]

This mining in parallel threads should be 2 to 4 times faster.

I have a different branch where I run those tests there I can show. Nevertheless I'll drop bellow a snapshot of a test of 200 consecutive mines:

...
No Threads Used
Duration: 83.46804200000001 ms
Found gas price: 0x7e78c8d8349f2a7be88f1b1b0fc4ef3e24ff04ab4242f505af776914510dc488
With Threads Used
Number threads 7
Duration: 5.3473749999999995 ms
Found gas price: 0x96b5717e8dc962658024b611c417b76001ebe0afdf0cce3407d93afa05a3b64f
No Threads Used
Duration: 439.514417 ms
Found gas price: 0x37f0db5d41ad9925c74c6e23fc4a24f1d9993c6d623a8e80d4fc326927682618
With Threads Used
Number threads 7
Duration: 90.587625 ms
Found gas price: 0x8c3c75e3119a3d8b3af97b00f95bd7bb61b3ed3894128af6a8b1ba50f9bfa6ac
No Threads Used
Duration: 237.67595799999998 ms
Found gas price: 0x124f0208b56c954eb0334d348cf9542ae1320612d456ace9580c54a1e55a0dc3
With Threads Used
Number threads 7
Duration: 30.72675 ms
Found gas price: 0x19cd68662f04bce185e247218b1f4fa3afbc8e675b3f1db6c46e27e24cb81918
No Threads Used
Duration: 22.635542 ms
Found gas price: 0xfbbc49c4f69bb20224c52caecddf57a238213a5a139e2f44b330237583f49093
With Threads Used
Number threads 7
Duration: 291.37008399999996 ms
Found gas price: 0x14189a28a3816e86ca223c7383f3a22d75d733b5bfcf76f7a6a6c5161689b2d6
No Threads Used
Duration: 313.287458 ms
Found gas price: 0xd8539fcc5277271ee5050d1f8307f083c1af0775370ac7744a94de4ebb0da033
With Threads Used
Number threads 7
Duration: 139.390125 ms
Found gas price: 0x860ef5c7e76a17be8428ea53ea5931886d005c8c3a8c75a8304b2cfa01bd3e84

Number of runs: 200
Average Duration No Threads: 486.723854765 ms
Average Duration With 7 Threads: 154.99360519499996 ms