Created
March 18, 2016 09:27
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sort & sort_by benchmark
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| #!/usr/bin/ruby | |
| require 'benchmark' | |
| ary = [] | |
| 1000.times { | |
| ary << {:bar => rand(1000)} | |
| } | |
| n = 500 | |
| Benchmark.bm(20) do |x| | |
| x.report("sort") { n.times { ary.sort{ |a,b| b[:bar] <=> a[:bar] } } } | |
| x.report("sort reverse") { n.times { ary.sort{ |a,b| a[:bar] <=> b[:bar] }.reverse } } | |
| x.report("sort_by -a[:bar]") { n.times { ary.sort_by{ |a| -a[:bar] } } } | |
| x.report("sort_by a[:bar]*-1") { n.times { ary.sort_by{ |a| a[:bar]*-1 } } } | |
| x.report("sort_by.reverse!") { n.times { ary.sort_by{ |a| a[:bar] }.reverse } } | |
| end | |
| user system total real | |
| sort 3.960000 0.010000 3.970000 ( 3.990886) | |
| sort reverse 4.040000 0.000000 4.040000 ( 4.038849) | |
| sort_by -a[:bar] 0.690000 0.000000 0.690000 ( 0.692080) | |
| sort_by a[:bar]*-1 0.700000 0.000000 0.700000 ( 0.699735) | |
| sort_by.reverse! 0.650000 0.000000 0.650000 ( 0.654447) |
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