From: nakatani katsumi <alchu@...>
Date: 2008-11-03T19:01:36+09:00
Subject: Re: Poor performance of Ruby 1.8.7 when installed with MacPorts

Hi

On Sat, 1 Nov 2008 19:58:54 +0900
abc <arcadiorubiogarcia@gmail.com> wrote:

> I've just upgraded to Ruby 1.8.7 using MacPorts (ruby @1.8.7-
> p72_1+thread_hooks) and while it runs flawlessly, the performance is
> really really poor.

> Is anyone experiencing the same problem? Do you know how to fix it?
The same problem reported at ruby-list-45593.(but Japanese only)

Summary is below.
1. On MacOS X(10.5.5), Ruby1.8.7(p72) compiled with --enable-pthread excute slowly, 
   as Ruby use time of 70% at rb_call()->getcontext() in fib.rb

2. In MacPorts, ./configure with --enable-pthread option makes config.h using getcontext 
like below
#define HAVE_GETCONTEXT 1 
#define HAVE_SETCONTEXT 1 

3. If you comment out these two lines, you will get normal speed Ruby1.8.7.

4. As Ruby1.9 don't use getcontext()/setcontext(), Ruby1.9 don't care --enable-pthread.