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Re: Parsing a rotated stream of 64 bits

From Tim Rentsch <txr@alumni.caltech.edu>
Newsgroups comp.lang.c
Subject Re: Parsing a rotated stream of 64 bits
Date 2015-11-10 14:00 -0800
Organization A noiseless patient Spider
Message-ID <kfnziylfraq.fsf@x-alumni2.alumni.caltech.edu> (permalink)
References <n0ov6q$s3t$1@dont-email.me> <kfnfv0ub2ct.fsf@x-alumni2.alumni.caltech.edu> <n0sl7b$qou$1@dont-email.me> <kfn1tcc9vpi.fsf@x-alumni2.alumni.caltech.edu> <n1pl8l$8n4$1@dont-email.me>

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pozz <pozzugno@gmail.com> writes:

> Il 30/10/2015 17:18, Tim Rentsch ha scritto:
>
>> Seems like a lot of code and a lot of computational effort for
>> the task.  Here is a shorter and probably faster method that I
>> think conforms to your interface.
>
> I measured both implementation on AVR ATtiny4313 MCU running at 8MHz.
>
> My implementation takes about 350us.  Your implementation more than 700us.
>
> I didn't study your implementation too much, I only put it as is in my
> project.

This doesn't tell me very much.  Presumably your code is tuned
both for the architecture and for the compiler used to compile
it.  My code is tuned for neither.  I suspect a lot depends on
that but I don't know what, since I don't have access to either.
I don't expect you to put in extra effort just to tailor my code
to that environment, but it would be nice to see if we could do
an apples-and-apples comparison.  Could I ask what compiler
you're using and what system it runs on?

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Thread

Parsing a rotated stream of 64 bits pozz <pozzugno@gmail.com> - 2015-10-27 23:54 +0100
  Re: Parsing a rotated stream of 64 bits Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-10-27 17:37 -0700
  Re: Parsing a rotated stream of 64 bits Bartc <bc@freeuk.com> - 2015-10-28 01:27 +0000
  Re: Parsing a rotated stream of 64 bits Nobody <nobody@nowhere.invalid> - 2015-10-28 05:13 +0000
  Re: Parsing a rotated stream of 64 bits David Brown <david.brown@hesbynett.no> - 2015-10-28 09:17 +0100
    Re: Parsing a rotated stream of 64 bits supercat@casperkitty.com - 2015-10-28 06:22 -0700
      Re: Parsing a rotated stream of 64 bits David Brown <david.brown@hesbynett.no> - 2015-10-28 16:07 +0100
        Re: Parsing a rotated stream of 64 bits supercat@casperkitty.com - 2015-10-28 08:41 -0700
          Re: Parsing a rotated stream of 64 bits David Brown <david.brown@hesbynett.no> - 2015-10-28 23:29 +0100
            Re: Parsing a rotated stream of 64 bits supercat@casperkitty.com - 2015-10-28 17:50 -0700
              Re: Parsing a rotated stream of 64 bits David Brown <david.brown@hesbynett.no> - 2015-10-29 13:56 +0100
          Re: Parsing a rotated stream of 64 bits pozz <pozzugno@gmail.com> - 2015-10-29 09:48 +0100
    Re: Parsing a rotated stream of 64 bits pozz <pozzugno@gmail.com> - 2015-10-29 09:34 +0100
      Re: Parsing a rotated stream of 64 bits David Brown <david.brown@hesbynett.no> - 2015-10-29 13:57 +0100
  Re: Parsing a rotated stream of 64 bits David Brown <david.brown@hesbynett.no> - 2015-10-28 09:21 +0100
  Re: Parsing a rotated stream of 64 bits Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-28 23:44 -0700
    Re: Parsing a rotated stream of 64 bits pozz <pozzugno@gmail.com> - 2015-10-29 09:28 +0100
      Re: Parsing a rotated stream of 64 bits Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-30 09:18 -0700
        Re: Parsing a rotated stream of 64 bits pozz <pozzugno@gmail.com> - 2015-11-09 09:27 +0100
          Re: Parsing a rotated stream of 64 bits Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-10 14:00 -0800
            Re: Parsing a rotated stream of 64 bits David Brown <david.brown@hesbynett.no> - 2015-11-11 10:48 +0100
              Re: Parsing a rotated stream of 64 bits Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-13 05:56 -0800
                Re: Parsing a rotated stream of 64 bits David Brown <david.brown@hesbynett.no> - 2015-11-13 16:32 +0100
                Re: Parsing a rotated stream of 64 bits Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-14 17:57 -0800
                Re: Parsing a rotated stream of 64 bits David Brown <david.brown@hesbynett.no> - 2015-11-15 23:43 +0100
                Re: Parsing a rotated stream of 64 bits Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-17 08:42 -0800
            Re: Parsing a rotated stream of 64 bits pozz <pozzugno@gmail.com> - 2015-11-13 14:58 +0100
              Re: Parsing a rotated stream of 64 bits Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-15 12:02 -0800
                Re: Parsing a rotated stream of 64 bits pozz <pozzugno@gmail.com> - 2015-11-16 10:16 +0100
                Re: Parsing a rotated stream of 64 bits Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-17 10:49 -0800
                Re: Parsing a rotated stream of 64 bits David Brown <david.brown@hesbynett.no> - 2015-11-17 23:34 +0100
                Re: Parsing a rotated stream of 64 bits Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-20 16:04 -0800
    Re: Parsing a rotated stream of 64 bits Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-10-29 03:56 -0700
      Re: Parsing a rotated stream of 64 bits Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-30 08:42 -0700
  Parsing a rotated stream of 64 bits asetofsymbols@gmail.com - 2015-11-16 03:03 -0800

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