WIF-Key based scanner for the 66 bit range.. ...happy Hunting!!

your code is the most inefficient way to search the puzzle.
Your way:
WIF->Private Key->Publickey->Sha256->rmd160->Address.
Why not only?
Publickey->Sha256->rmd160
In this way you avoid some steps that need a lot of calculation.
Regards!
simple answer...
the area that is random consists of only 6 letters from the Wif-key...
and the secp256k1 from (ice) is super fast...
the calculation takes place one after the other, not at the same time, which would take time...