I dunno who I should pester about this small tweak, but...
Given that even on a massive system, the collisionspermin metric is < 100, maybe this
"hashmeter" line should be adjusted.
I think regular units would be fine here.
hashpermin is already a small number, so
hashpersec would be tiny,
khashpersec is unreadable.
printf("hashmeter %.6f hash/s\n", dHashesPerSec);