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Re: Open letter to Ian Collins

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From Ian Collins <ian-news@hotmail.com>
Newsgroups comp.lang.c
Subject Re: Open letter to Ian Collins
Date Sun, 27 May 2012 20:56:16 +1200
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On 05/27/12 07:30 PM, jacob navia wrote:
> Le 27/05/12 05:16, Ian Collins a écrit :
>> On 05/27/12 10:22 AM, jacob navia wrote:
>>> Hi Ian
>>>
>>> In the c++ newsgroup you asked me for an example of the ccl performance
>>> It was something with building a huge list, then sorting it, if I
>>> remember correctly...
>>>
>>> I have built this example code:
>>>
>> <snip>
>>
>> I get a segv when I run the example. Running in dbx with access checking
>> enabled shows:
>
> I corrected that yesterday. When you asked me gthis example I was in the
> middle of a reorganization of heap.c. Look at the latest update

OK, I thought I had but I didn't notice wget saving the file as cc.zip.1 
rather than overwriting the version I downloaded earlier in the week.

Anyway I ran ran the code built with Sun Studio rather than gcc because 
it runs quite a bit faster.  As I expected, the big difference was in 
sorting:

ccl version:

To sort     85.6384S

C++ version (std::list.sort()):

To sort     18.7927S

Iteration was closer:

To access    2.80655S (ccl)
To access    1.82896S

-- 
Ian Collins

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Thread

Open letter to Ian Collins jacob navia <jacob@spamsink.net> - 2012-05-27 00:22 +0200
  Re: Open letter to Ian Collins Ike Naar <ike@sverige.freeshell.org> - 2012-05-26 22:36 +0000
    Re: Open letter to Ian Collins jacob navia <jacob@spamsink.net> - 2012-05-27 01:13 +0200
      Re: Open letter to Ian Collins Barry Schwarz <schwarzb@dqel.com> - 2012-05-26 16:53 -0700
    Re: Open letter to Ian Collins Malcolm McLean <malcolm.mclean5@btinternet.com> - 2012-05-26 16:41 -0700
      Re: Open letter to Ian Collins pete <pfiland@mindspring.com> - 2012-05-26 22:43 -0400
  Re: Open letter to Ian Collins Malcolm McLean <malcolm.mclean5@btinternet.com> - 2012-05-26 15:41 -0700
    Re: Open letter to Ian Collins jacob navia <jacob@spamsink.net> - 2012-05-27 01:14 +0200
  Re: Open letter to Ian Collins MelissA <melis@a.com> - 2012-05-27 00:52 +0200
  Re: Open letter to Ian Collins Stephen Sprunk <stephen@sprunk.org> - 2012-05-26 20:40 -0500
    Re: Open letter to Ian Collins jacob navia <jacob@spamsink.net> - 2012-05-27 09:32 +0200
      Re: Open letter to Ian Collins pete <pfiland@mindspring.com> - 2012-05-27 07:18 -0400
  Re: Open letter to Ian Collins Ian Collins <ian-news@hotmail.com> - 2012-05-27 14:24 +1200
    Re: Open letter to Ian Collins "BartC" <bc@freeuk.com> - 2012-05-27 10:36 +0100
      Re: Open letter to Ian Collins Ian Collins <ian-news@hotmail.com> - 2012-05-27 22:33 +1200
        Re: Open letter to Ian Collins "BartC" <bc@freeuk.com> - 2012-05-27 12:25 +0100
          Re: Open letter to Ian Collins Ian Collins <ian-news@hotmail.com> - 2012-05-28 07:17 +1200
      Re: Open letter to Ian Collins Ike Naar <ike@sverige.freeshell.org> - 2012-05-27 13:03 +0000
  Re: Open letter to Ian Collins Ian Collins <ian-news@hotmail.com> - 2012-05-27 15:16 +1200
    Re: Open letter to Ian Collins jacob navia <jacob@spamsink.net> - 2012-05-27 09:30 +0200
      Re: Open letter to Ian Collins Ian Collins <ian-news@hotmail.com> - 2012-05-27 20:56 +1200
        Re: Open letter to Ian Collins jacob navia <jacob@spamsink.net> - 2012-05-27 11:12 +0200
          Re: Open letter to Ian Collins Ian Collins <ian-news@hotmail.com> - 2012-05-27 21:22 +1200
            Re: Open letter to Ian Collins pete <pfiland@mindspring.com> - 2012-05-27 07:15 -0400
            Re: Open letter to Ian Collins Keith Thompson <kst-u@mib.org> - 2012-05-27 07:49 -0700
              Re: Open letter to Ian Collins pete <pfiland@mindspring.com> - 2012-05-27 13:55 -0400
                Re: Open letter to Ian Collins jacob navia <jacob@spamsink.net> - 2012-05-27 22:24 +0200
                Re: Open letter to Ian Collins "BartC" <bc@freeuk.com> - 2012-05-27 22:09 +0100
                Re: Open letter to Ian Collins Keith Thompson <kst-u@mib.org> - 2012-05-27 14:33 -0700
                Re: Open letter to Ian Collins pete <pfiland@mindspring.com> - 2012-05-27 17:49 -0400
                Re: Open letter to Ian Collins pete <pfiland@mindspring.com> - 2012-05-27 17:31 -0400
                Re: Open letter to Ian Collins Philip Lantz <prl@canterey.us> - 2012-05-28 01:38 -0700
                Re: Open letter to Ian Collins pete <pfiland@mindspring.com> - 2012-05-28 08:18 -0400
        Re: Open letter to Ian Collins "BartC" <bc@freeuk.com> - 2012-05-27 15:46 +0100
        Open letter to Ian Collins pete <pfiland@mindspring.com> - 2012-06-13 21:25 -0400
          Re: Open letter to Ian Collins pete <pfiland@mindspring.com> - 2012-06-13 21:52 -0400
          Re: Open letter to Ian Collins jacob navia <jacob@spamsink.net> - 2012-06-14 04:00 +0200
            Re: Open letter to Ian Collins pete <pfiland@mindspring.com> - 2012-06-14 00:04 -0400
  Re: Open letter to Ian Collins jacob navia <jacob@spamsink.net> - 2012-05-27 09:42 +0200
  Re: Open letter to Ian Collins "io_x" <a@b.c.invalid> - 2012-05-28 12:39 +0200
    Re: Open letter to Ian Collins "io_x" <a@b.c.invalid> - 2012-05-28 21:44 +0200
      Re: Open letter to Ian Collins jacob navia <jacob@spamsink.net> - 2012-05-29 09:46 +0200
        Re: Open letter to Ian Collins "io_x" <a@b.c.invalid> - 2012-05-29 10:06 +0200
          Re: Open letter to Ian Collins "io_x" <a@b.c.invalid> - 2012-05-29 10:37 +0200
            Re: Open letter to Ian Collins "io_x" <a@b.c.invalid> - 2012-05-29 10:58 +0200
              Re: Open letter to Ian Collins "Joachim Schmitz" <nospam.jojo@schmitz-digital.de> - 2012-05-29 11:34 +0200
              Re: Open letter to Ian Collins Malcolm McLean <malcolm.mclean5@btinternet.com> - 2012-05-29 03:02 -0700
      Re: Open letter to Ian Collins "io_x" <a@b.c.invalid> - 2012-05-29 09:59 +0200
      Re: Open letter to Ian Collins "io_x" <a@b.c.invalid> - 2012-05-29 20:09 +0200
  Re: Open letter to Ian Collins "Sarah Wren" <swreb@ameritech.net> - 2012-05-29 01:40 -0600

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