Created
May 18, 2015 17:56
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Benchmarking Ruby's Math.sqrt vs raising to the power of 1/2
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| Calculating ------------------------------------- | |
| sqrt 103.322k i/100ms | |
| x ** 0.5 125.661k i/100ms | |
| ------------------------------------------------- | |
| sqrt 2.277M (± 6.1%) i/s - 11.365M | |
| x ** 0.5 3.717M (± 5.7%) i/s - 18.598M | |
| Comparison: | |
| x ** 0.5: 3717095.3 i/s | |
| sqrt: 2277003.6 i/s - 1.63x slower |
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| require 'benchmark/ips' | |
| Benchmark.ips do |x| | |
| x.report('sqrt') { Math.sqrt(rand(1024)) } | |
| x.report('x ** 0.5') { rand(1024) ** 0.5 } | |
| x.compare! | |
| end |
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Ran these on an i7-3517U CPU @ 1.90GHz.
Ruby 2.2:
Ruby 2.3:
Meanwhile Crystal 0.9.1:
;)