hi, https://bitbucket.org/mihailp/tankfeeder/raw/43d62edb11d56b4ffada4f728ab59b5455c97fbc/pow.l
https://bitmessage.org/wiki/Proof_of_work I've implement more two versions for calculation Bitmessage POW on (later) and (co) functions. It works. environment: o) DELL PowerEdge 430 (modern) o) Centos 7 o) pil64 o) equal number (64) of workers for later and co. bench: o) in-row ~10 secs o) co ~10 secs o) later ~2 secs p.s. I will add all this code to bundle of tests for future releases. Mike