From: Reid Thompson <reid.thompson@...>
Date: 2007-09-21T09:19:39+09:00
Subject: Re: How fast does your Ruby run?

Reid Thompson wrote:
> SpringFlowers AutumnMoon wrote:
>> How fast does your Ruby run?
>>
>> I got 53648 iterations per second running the following program,
>> on an Intel 3.2 GHz HT, Win XP machine:
>>
>> --------
>>
>> C:\> ruby calculate.rb
>> 55
>>
>> Ruby 1.8.6 patch 0 on i386-mswin32
>> It took 18.64 seconds to run. 53648 iterations per second.
>>
>> --------
>>
>> n = 1_000_000
>>
>> start_time = Time.now
>>
>> for i in 1..n
>>   t = (1..10).inject {|x, y| x + y }
>> end
>>
>> finish_time = Time.now
>>
>> p t
>>
>> puts
>> print "Ruby ", RUBY_VERSION, " patch ", RUBY_PATCHLEVEL, " on ",
>> RUBY_PLATFORM
>>
>> puts
>> print "It took #{finish_time - start_time} seconds to run."
>> print " #{(n / (finish_time - start_time)).to_i} iterations per
>> second.\n"
> 
> amd athlon 2500+XP processor (1883 MHz) 1GB ram
> 
> -------------cygwin ruby 1.8.6----------
> ruby 1.8.6 (2007-03-13 patchlevel 0) [i386-cygwin]
> yes, that's on cygwin.
> $ ruby howquick.rb
> 55
> 
> Ruby 1.8.6 patch 0 on i386-cygwin
> It took 15.816 seconds to run. 63227 iterations per
> second.
> 
> 
> -------------native ruby same box 1.8.5----------
> C:\ruby\bin>ruby c:\cygwin\home\rthompso\howquick.rb
> 55
> 
> c:/cygwin/home/rthompso/howquick.rb:14: uninitialized constant 
> RUBY_PATCHLEVEL (
> NameError)
> removed pathlevel ..
> C:\ruby\bin>ruby c:\cygwin\home\rthompso\howquick.rb
> 55
> 
> Ruby 1.8.5 on i386-mswin32
> It took 30.782 seconds to run. 32486 iterations per
> second.
> 
> -------------native ruby same box updated to 1.8.6----------
> C:\ruby\bin>ruby c:\cygwin\home\rthompso\howquick.rb
> 55
> 
> Ruby 1.8.6 patch 0 on i386-mswin32
> It took 24.453 seconds to run. 40894 iterations per
> second.
> 
> ------------ruby 1.8.5 linux core2 duo gentoo 2gb RAM-------
> rthompso@raker ~ $ ruby howquick.rb
> 55
> 
> Ruby 1.8.5 patch 2 on i686-linux
> It took 11.779449 seconds to run. 84893 iterations per
> second.
> 
> ------------updated ruby 1.8.6 same linux core2 duo 2gb RAM---
> 
> rthompso@raker ~ $ ruby howquick.rb
> 55
> 
> Ruby 1.8.6 patch 36 on i686-linux
> It took 9.702104 seconds to run. 103070 iterations per
> second.
forgot the processor speed for the linux core2 duo
model name      : Intel(R) Core(TM)2 CPU          6320  @ 1.86GHz