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jodosha/each_benchmark.rb

Created November 9, 2009 13:49
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Ruby benchmark: Array#each vs for x in array
Raw
each_benchmark.rb
#!/usr/bin/env ruby -w
require "benchmark"
TIMES = 100_000
ARRAY = (1..1_000).to_a
Benchmark.bm(30) do |b|
b.report "each" do
TIMES.times do |i|
ARRAY.each do |element|
end
end
end
b.report "for ... in" do
TIMES.times do |i|
for x in ARRAY
end
end
end
end
__END__
user system total real
each 9.710000 0.010000 9.720000 ( 9.740620)
for ... in 7.460000 0.000000 7.460000 ( 7.475158)
@el-rotny
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ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-linux]

                                     user     system      total        real
each                             4.910000   0.000000   4.910000 (  4.916322)
for ... in                       6.780000   0.000000   6.780000 (  6.783303)
for ... in 0..limit              8.390000   0.000000   8.390000 (  8.396801)
while i <ARRAY.size              7.920000   0.000000   7.920000 (  7.936485)
while i <limit                   6.100000   0.000000   6.100000 (  6.101939)

@SamSaffron
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Ruby 2.7.0

each                             2.158537   0.000000   2.158537 (  2.159440)
for ... in                       2.278251   0.000000   2.278251 (  2.279027)
for ... in 0..limit              2.698481   0.000000   2.698481 (  2.699452)
while i <ARRAY.size              1.650970   0.000000   1.650970 (  1.651618)
while i <limit                   1.560133   0.000000   1.560133 (  1.560785)

@mtunjic
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mtunjic commented Jul 25, 2021

ruby 3.0.2p107 (2021-07-07 revision 0db68f0233) [x86_64-linux]

                                     user     system      total        real
each                             2.767563   0.001415   2.768978 (  2.769054)
for ... in                       2.910278   0.000017   2.910295 (  2.910301)
for ... in 0..limit              3.669667   0.000005   3.669672 (  3.669689)
while i < ARRAY.size             2.346777   0.000007   2.346784 (  2.346790)
while i < limit                  1.973913   0.000000   1.973913 (  1.973939)

@ozovalihasan
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ruby 3.1.2p20 (2022-04-12 revision 4491bb740a) [x86_64-linux]

                                     user     system      total        real
each                             6.655506   0.011998   6.667504 (  6.668422)
for ... in                       7.203961   0.008000   7.211961 (  7.212894)
for ... in 0..limit              8.075872   0.012000   8.087872 (  8.088514)
while i <ARRAY.size              4.219771   0.008000   4.227771 (  4.227991)
while i <limit                   3.359660   0.003999   3.363659 (  3.363865)

@os6sense
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ruby 3.2.1 (2023-02-08 revision 31819e82c8) [x86_64-linux]

                                     user     system      total        real
each                             2.052966   0.000207   2.053173 (  2.053209)
for ... in                       2.225467   0.000006   2.225473 (  2.225489)
for ... in 0..limit              2.478339   0.000000   2.478339 (  2.478365)
while i <ARRAY.size              1.727570   0.000000   1.727570 (  1.727601)
while i <limit                   1.469423   0.000001   1.469424 (  1.469439)

@realhaidinh
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ruby 3.2.2 (2023-03-30 revision e51014f9c0) [x64-mingw-ucrt]

                                   user     system      total        real
each                             4.203000   0.000000   4.203000 (  4.222868)
for ... in                       4.562000   0.000000   4.562000 (  4.583148)
for ... in 0..limit              5.047000   0.000000   5.047000 (  5.050032)
while i <ARRAY.size              2.219000   0.000000   2.219000 (  2.235048)
while i <limit                   1.984000   0.000000   1.984000 (  2.017428)

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