Revert "Make Blob.gist 40x faster"
Revert "Make Blob.gist 40x faster"

This reverts commit be83cd4ec72c67c825d343057fa965e2086f0e47.

I think I got carried away and it's too unreadable. Will make
just the .fmt() call in nqp, as that's the main slowdown here.

rakudo/rakudo,tony-o/rakudo,tbrowder/rakudo,awwaiid/rakudo,MasterDuke17/rakudo,salortiz/rakudo,rakudo/rakudo,MasterDuke17/rakudo,nbrown/rakudo,tbrowder/rakudo,softmoth/rakudo,salortiz/rakudo,MasterDuke17/rakudo,raydiak/rakudo,awwaiid/rakudo,awwaiid/rakudo,nbrown/rakudo,Gnouc/rakudo,awwaiid/rakudo,tony-o/rakudo,softmoth/rakudo,tbrowder/rakudo,raydiak/rakudo,salortiz/rakudo,MasterDuke17/rakudo,tony-o/rakudo,tbrowder/rakudo,rakudo/rakudo,tony-o/rakudo,raydiak/rakudo,tbrowder/rakudo,nbrown/rakudo,nbrown/rakudo,MasterDuke17/rakudo,lucasbuchala/rakudo,Gnouc/rakudo,labster/rakudo,nbrown/rakudo,labster/rakudo,rakudo/rakudo,labster/rakudo,labster/rakudo,usev6/rakudo,rakudo/rakudo,salortiz/rakudo,rakudo/rakudo,usev6/rakudo,tony-o/rakudo,lucasbuchala/rakudo,salortiz/rakudo,MasterDuke17/rakudo,softmoth/rakudo,labster/rakudo,Gnouc/rakudo,Gnouc/rakudo,tbrowder/rakudo,softmoth/rakudo,Gnouc/rakudo,raydiak/rakudo,usev6/rakudo,salortiz/rakudo,lucasbuchala/rakudo,tony-o/rakudo,usev6/rakudo,lucasbuchala/rakudo,awwaiid/rakudo,labster/rakudo,lucasbuchala/rakudo,nbrown/rakudo,usev6/rakudo,Gnouc/rakudo,softmoth/rakudo