From: "M. Edward (Ed) Borasky" <znmeb@...>
Date: 2008-01-28T13:02:28+09:00
Subject: Re: Ruby Script Under performance in CYGWIN environment

ankit wrote:
> Hi,
> 
> I have written one ruby script to execute the regression testcases.
> There are more than five thousand of testcases to be run daily.
> 
> For Linux, the performance was ok and on expected line but on CYGWIN
> shell, the script is taking a lot more time ( I would say almost
> double of time) in running the same testcases as compared to similar
> script written in  perl.
> 
> Is ruby under performance is related  and specific to cygwin shell or
> is ruby not meant at all to be run on windows and this is known
> performance issue?
> 
> I am using the following : CYGWIN_NT-5.1 and ruby 1.8.4
> 
> regards,
> Ankit
> 
> 

Download the Ruby source (1.8.6) and recompile it on Cygwin using the 
following CFLAGS

export CFLAGS='-O3 -march=<your processor type goes here>'

For example, if you're running a Pentium 4, do

export CFLAGS='-O3 -march=pentium4'

That will give you at least a 10 percent improvement over the base Ruby 
1.8.4 you have now.