From: Ezra Zygmuntowicz <ezmobius@...>
Date: 2008-10-27T06:47:52+09:00
Subject: Re: Mac OS X Leopard - Ruby is 3X faster with disable-pthreads


On Oct 25, 2008, at 9:59 PM, Aryk Grosz wrote:

> I have a fast mac pro computer.
>
> I ran simple benchmark, and my computer took 13 seconds when
> equal/slower macs around my office were only taking 2.5 seconds to
> complete the exact same task.
>
> I also noticed that my ruby was generally less zippier.
>
> So I configure ruby to run WITHOUT pthread support, and now its at the
> same speed as the other computers.
>
> I dont really know how this could potentially screw things up, but Im
> definitely liking the speed increase. The compiler told me the
> following:
>
> **
> ** PTHREAD SUPPORT MODE ERROR:
> **
> **   Ruby is not compiled with --enable-pthread, but your Tcl/Tk
> **   library seems to be compiled with pthread support. This
> **   combination may cause frequent hang or segmentation fault
> **   errors when Ruby/Tk is working. We recommend that you NEVER
> **   create the library with such a combination of pthread support.
> **
> **   Please recompile Ruby with the "--enable-pthread" configure  
> option
> **   or recompile Tcl/Tk with the "--disable-threads" configure  
> option.
> **
>
> What Im curious about is, why the big speed difference? Its a night  
> and
> day difference in performance. Is there any kind of other performance
> issues that I have to watch out for now, like more frequent crashing  
> or
> something?
> -- 
> Posted via http://www.ruby-forum.com/.
>


	As long as you aren't using tk at all then you have no issue to watch  
out for. I compile *all* of my ruby's with pthreads disabled including  
all engine yard slices.

Cheers-


Ezra Zygmuntowicz
ez@engineyard.com