From: Aaron Smith <beingthexemplary@...>
Date: 2007-06-22T05:28:17+09:00
Subject: Re: Ruby extensions question..

MenTaLguY wrote:
> On Fri, 22 Jun 2007 03:55:11 +0900, Aaron Smith 
> <beingthexemplary@gmail.com> wrote:
>> One more question. Maybe this will end up having the same answer.. But
>> let's say I have an object that I pass to the ruby extension. and all
>> operations in the C code i'm doing are on that object passed using
>> rb_funcall, rb_iv_get, etc. is it still seeing performance gains with C?
> 
> Usually not much.  Local variables are a little cheaper, and there's no 
> AST-walking for evaluation, but that's about the extent of it.  Ruby 
> method calls are a lot more expensive, so the big wins are when you can 
> avoid Ruby method calls (i.e. rb_funcall) altogether.  Otherwise, it's 
> just not worth the maintainability and portability problems.
> 
> -mental

Thanks, helps more. I think where I'm going with this is that its best 
to write a C program that does everything needed. Then come back and 
extend Ruby with those pieces. Instead of worrying about Ruby 
integration now, wait till the straight C functionality is there.. Then 
there should only be slight overhead of a few rb_* calls.

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