parallelise using threads

[nkanaev]

Hi

I wanted to say that's a great work you've done porting the original implementation to the new hardware. That truly is impressive.

I've made a small tweak to parallelize the workload across multiple threads that speeds up the computation significantly. I just wanted to share with you, feel free to close the PR if you don't like it.

Before:

Enter intial text: This autogram contains and
Initial constants: [5, 1, 2, 2, 8, 2, 2, 2, 4, 1, 1, 1, 2, 10, 12, 1, 1, 2, 7, 7, 2, 2, 4, 1, 1, 1]

Running Pangram Machine Mark II...
EUREKA! [5, 1, 2, 2, 26, 6, 2, 4, 13, 1, 1, 1, 2, 21, 16, 1, 1, 5, 27, 20, 3, 6, 9, 5, 5, 1]
This autogram contains five a's, one b, two c's, two d's, twenty-six e's, six f's, two g's, four h's, thirteen i's, one j, one k, one l, two m's, twenty-one n's, sixteen o's, one p, one q, five r's, twenty-seven s's, twenty t's, three u's, six v's, nine w's, five x's, five y's and one z.

EUREKA! [5, 1, 2, 2, 31, 5, 5, 8, 12, 1, 1, 2, 2, 18, 16, 1, 1, 6, 27, 21, 3, 7, 8, 3, 4, 1]
This autogram contains five a's, one b, two c's, two d's, thirty-one e's, five f's, five g's, eight h's, twelve i's, one j, one k, two l's, two m's, eighteen n's, sixteen o's, one p, one q, six r's, twenty-seven s's, twenty-one t's, three u's, seven v's, eight w's, three x's, four y's and one z.

Finished 6273179136 iterations in 10.38 seconds which is equivalent to 604.2 MHz.

After:

Enter intial text: This autogram contains and
Initial constants: [5, 1, 2, 2, 8, 2, 2, 2, 4, 1, 1, 1, 2, 10, 12, 1, 1, 2, 7, 7, 2, 2, 4, 1, 1, 1]

Running Pangram Machine Mark II...
EUREKA! [5, 1, 2, 2, 31, 5, 5, 8, 12, 1, 1, 2, 2, 18, 16, 1, 1, 6, 27, 21, 3, 7, 8, 3, 4, 1]
This autogram contains five a's, one b, two c's, two d's, thirty-one e's, five f's, five g's, eight h's, twelve i's, one j, one k, two l's, two m's, eighteen n's, sixteen o's, one p, one q, six r's, twenty-seven s's, twenty-one t's, three u's, seven v's, eight w's, three x's, four y's and one z.

EUREKA! [5, 1, 2, 2, 26, 6, 2, 4, 13, 1, 1, 1, 2, 21, 16, 1, 1, 5, 27, 20, 3, 6, 9, 5, 5, 1]
This autogram contains five a's, one b, two c's, two d's, twenty-six e's, six f's, two g's, four h's, thirteen i's, one j, one k, one l, two m's, twenty-one n's, sixteen o's, one p, one q, five r's, twenty-seven s's, twenty t's, three u's, six v's, nine w's, five x's, five y's and one z.

Finished 6273179136 iterations in 1.86 seconds which is equivalent to 3368.6 MHz.

[tuzz]

Hey @nkanaev, this is wonderful, thank you! More than happy to merge, and I'll give credit in the README.

I'll update the MHz for my machine (yours is faster than mine) so that it's consistent with the single-threaded case.

Thanks again.