Benchmark: running Ref, newhash, each for at least 3 CPU seconds...
       Ref:  3 wallclock secs ( 3.24 usr +  0.01 sys =  3.25 CPU) @ 381.54/s (n=1240)
   newhash:  3 wallclock secs ( 3.21 usr +  0.00 sys =  3.21 CPU) @ 211.84/s (n=680)
         Rate newhash     Ref
newhash 212/s      --    -44%
Ref     382/s     80%      --