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Re: Need for speed -> a C extension?

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From Martin Hansen <mail@maasha.dk>
Newsgroups comp.lang.ruby
Subject Re: Need for speed -> a C extension?
Date Tue, 19 Apr 2011 05:30:52 -0500
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>>  def match?(char1, char2)
>>    (EQUAL[char1.upcase.ord] & EQUAL[char2.upcase.ord]) != 0
>>  end
>
> That would be really easy to write tests and a benchmark against and
> then rewrite in C using RubyInline... without tests and a benchmark tho,
> you won't know that you've done it correctly and provides a measurable
> benefit.

They bottlenecks are the iteration over the sequence (while loop at line
68) and the vector_update (line 120). I am a bit surprised that match?
is that slow - I expect it to be almost instantaneous in C. I would like
to test that with a benchmark and Inline C.

And I just discovered RubyInline! Inline code is so much easier to deal
with that an external library IMHO. I have been messing a bit around
with "inline", but that turns out to be some old crappy gem!!! Its not
the first time I have missed the right gem :o( ...

However, I get a peculiar error when testing RubyInline with the first
of the examples:

http://pastie.org/1811057

I am on Ruby 1.9.2.


Cheers,


Martin

-- 
Posted via http://www.ruby-forum.com/.

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Thread

Need for speed -> a C extension? Martin Hansen <mail@maasha.dk> - 2011-04-18 10:15 -0500
  Re: Need for speed -> a C extension? Chuck Remes <cremes.devlist@mac.com> - 2011-04-18 11:10 -0500
  Re: Need for speed -> a C extension? Robert Klemme <shortcutter@googlemail.com> - 2011-04-18 11:10 -0500
  Re: Need for speed -> a C extension? "WJ" <w_a_x_man@yahoo.com> - 2011-04-18 17:34 +0000
    Re: Need for speed -> a C extension? Martin Hansen <mail@maasha.dk> - 2011-04-18 13:30 -0500
      Re: Need for speed -> a C extension? Ryan Davis <ryand-ruby@zenspider.com> - 2011-04-18 14:15 -0500
        Re: Need for speed -> a C extension? Martin Hansen <mail@maasha.dk> - 2011-04-19 05:30 -0500
          Re: Need for speed -> a C extension? Robert Klemme <shortcutter@googlemail.com> - 2011-04-19 07:21 -0500
            Re: Need for speed -> a C extension? Martin Hansen <mail@maasha.dk> - 2011-04-19 08:13 -0500
              Re: Need for speed -> a C extension? Robert Klemme <shortcutter@googlemail.com> - 2011-04-19 09:56 -0500
              Re: Need for speed -> a C extension? Robert Klemme <shortcutter@googlemail.com> - 2011-04-19 10:19 -0500
          Re: Need for speed -> a C extension? brabuhr@gmail.com - 2011-04-19 08:35 -0500
            Re: Need for speed -> a C extension? Martin Hansen <mail@maasha.dk> - 2011-04-19 09:12 -0500
              Re: Need for speed -> a C extension? brabuhr@gmail.com - 2011-04-19 13:51 -0500
              Re: Need for speed -> a C extension? brabuhr@gmail.com - 2011-04-19 18:13 -0500
                Re: Need for speed -> a C extension? Martin Hansen <mail@maasha.dk> - 2011-04-20 02:04 -0500
                Re: Need for speed -> a C extension? brabuhr@gmail.com - 2011-04-20 07:33 -0500
                Re: Need for speed -> a C extension? brabuhr@gmail.com - 2011-04-20 07:40 -0500
                Re: Need for speed -> a C extension? Martin Hansen <mail@maasha.dk> - 2011-04-20 07:55 -0500
                Re: Need for speed -> a C extension? brabuhr@gmail.com - 2011-04-20 08:42 -0500
                Re: Need for speed -> a C extension? Martin Hansen <mail@maasha.dk> - 2011-04-20 10:18 -0500
                Re: Need for speed -> a C extension? Phillip Gawlowski <cmdjackryan@googlemail.com> - 2011-04-20 10:24 -0500
                Re: Need for speed -> a C extension? Eric Christopherson <echristopherson@gmail.com> - 2011-04-20 17:08 -0500
                Re: Need for speed -> a C extension? brabuhr@gmail.com - 2011-04-20 10:34 -0500
                Re: Need for speed -> a C extension? brabuhr@gmail.com - 2011-04-20 10:39 -0500
              Re: Need for speed -> a C extension? Colin Bartlett <colinb2r@googlemail.com> - 2011-04-20 22:39 -0500
  Re: Need for speed -> a C extension? Martin Hansen <mail@maasha.dk> - 2011-05-15 04:16 -0500
    Re: Need for speed -> a C extension? Robert Klemme <shortcutter@googlemail.com> - 2011-05-15 13:46 +0200

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