Created
June 5, 2013 17:00
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Simple Micro-Benchmark to show Symbol#to_proc performance hit
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#!/usr/bin/env ruby | |
require 'benchmark' | |
N = 1_000_000 | |
A = (0..10).to_a | |
def map_plain | |
A.map {|e| e.to_s} | |
end | |
def map_to_proc | |
A.map(&:to_s) | |
end | |
puts RUBY_DESCRIPTION | |
Benchmark.bm(8) do |x| | |
x.report('plain') { N.times { map_plain } } | |
x.report('to_proc') { N.times { map_to_proc } } | |
end | |
__END__ | |
# Example results: | |
ruby 2.0.0p195 (2013-05-14 revision 40734) [x86_64-linux] | |
user system total real | |
plain 2.580000 0.000000 2.580000 ( 2.591577) | |
to_proc 2.460000 0.000000 2.460000 ( 2.473722) | |
ruby 1.9.2p318 (2012-02-14 revision 34678) [x86_64-linux] | |
user system total real | |
plain 2.590000 0.000000 2.590000 ( 2.601503) | |
to_proc 2.470000 0.030000 2.500000 ( 2.503922) | |
ruby 1.8.7 (2012-02-08 MBARI 8/0x6770 on patchlevel 358) [x86_64-linux], MBARI 0x6770, Ruby Enterprise Edition 2012.02 | |
user system total real | |
plain 6.300000 0.000000 6.300000 ( 6.322921) | |
to_proc 8.240000 0.000000 8.240000 ( 8.263345) | |
ruby 1.8.7 (2011-02-18 patchlevel 334) [x86_64-linux] | |
user system total real | |
plain 4.770000 0.000000 4.770000 ( 4.791040) | |
to_proc 6.960000 0.030000 6.990000 ( 7.015733) |
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