# Benchmark of loops

**URL:** <https://www.ruby-forum.com/t/benchmark-of-loops/112719>\
**Category:** Development\
**Created:** [August 22, 2007, 3:27pm UTC](https://www.ruby-forum.com/t/benchmark-of-loops/112719 "2007-08-22T15:27:21Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![SASADA\_Koichi](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/f1d935/32.png) [@SASADA\_Koichi](https://www.ruby-forum.com/u/SASADA_Koichi)\
**Post date:** [August 22, 2007, 3:27pm UTC](https://www.ruby-forum.com/t/benchmark-of-loops/112719/1 "2007-08-22T15:27:21Z")

</div>

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$ make benchmark-each MATZRUBY=`which ruby` ITEM=loop  
./miniruby …/trunk/runruby.rb --extout=.ext –  
…/trunk/benchmark/run.rb bm\_loop --ruby=./ruby  
–matzruby=/usr/bin/ruby --opts=-I…/trunk/lib  
MatzRuby:  
ruby 1.8.5 (2006-08-25) [i486-linux]  
Ruby:  
ruby 1.9.0 (2007-08-22 patchlevel 0) [i686-linux]

* * *

loop\_generator:  
max = 6000000

if defined? Fiber  
gen = (1…max).each  
else  
require ‘generator’  
gen = Generator.new((0…max))  
end

## if true while gen.next? gen.next end else (0…max).each{|e|} end

## matz 419.819 ruby 30.508

## loop\_times: 30000000.times{|e|}

## matz 49.387 ruby 6.977

## loop\_whileloop: i = 0 while i\<30000000 # benchmark loop 1 i+=1 end

## matz 23.474 ruby 2.757

loop\_whileloop2:  
i=0  
while i\<6000000 # benchmark loop 2  
i+=1  
end

–  
matz 4.936  
ruby 0.539

– benchmark summary ---------------------------  
loop\_generator 419.819 30.508  
loop\_times 49.387 6.977  
loop\_whileloop 23.474 2.757  
loop\_whileloop2 4.936 0.539