Benchmark: timing 1000000 iterations of Hash Assigned Hit Equality, Hash Assigned Hit Truth, Hash Assigned Miss Equality, Hash Assigned Miss Truth, Hash Defined Hit, Hash Defined Miss... Hash Assigned Hit Equality: 5 wallclock secs ( 1.52 usr + 0.00 sys = 1.52 CPU) @ 657894.74/s (n=1000000) Hash Assigned Hit Truth: 3 wallclock secs ( 1.29 usr + -0.01 sys = 1.28 CPU) @ 781250.00/s (n=1000000) Hash Assigned Miss Equality: 3 wallclock secs ( 1.30 usr + 0.00 sys = 1.30 CPU) @ 769230.77/s (n=1000000) Hash Assigned Miss Truth: 1 wallclock secs ( 1.15 usr + 0.01 sys = 1.16 CPU) @ 862068.97/s (n=1000000) Hash Defined Hit: 1 wallclock secs ( 1.41 usr + 0.00 sys = 1.41 CPU) @ 709219.86/s (n=1000000) Hash Defined Miss: 2 wallclock secs ( 0.95 usr + 0.00 sys = 0.95 CPU) @ 1052631.58/s (n=1000000)