Benchmark: running puk, rev for at least 2 CPU seconds...
       puk:  2 wallclock secs ( 2.08 usr +  0.00 sys =  2.08 CPU) @ 16447.12/s (n=34210)
       rev:  3 wallclock secs ( 2.08 usr +  0.00 sys =  2.08 CPU) @ 217107.21/s (n=451583)
        Rate   puk   rev
puk  16447/s    --  -92%
rev 217107/s 1220%    --