Avoid time discrepancies when benchmarking
You can avoid time discrepancies due to gc and allocs by using Benchmark#bmbm
:
Rehearsal -----------------------------------------
sort! 1.490000 0.010000 1.500000 ( 1.490520)
sort 1.460000 0.000000 1.460000 ( 1.463025)
-------------------------------- total: 2.960000sec
user system total real
sort! 1.460000 0.000000 1.460000 ( 1.460465)
sort 1.450000 0.010000 1.460000 ( 1.448327)
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