Re: filling area by color atack safety

From	Tim Rentsch <tr.17687@z991.linuxsc.com>
Newsgroups	comp.lang.c
Subject	Re: filling area by color atack safety
Date	2024-04-09 02:32 -0700
Organization	A noiseless patient Spider
Message-ID	<86y19m285s.fsf@linuxsc.com> (permalink)
References	(10 earlier) <867chlk1zf.fsf@linuxsc.com> <20240329162141.00006c81@yahoo.com> <86y1a0i4tp.fsf@linuxsc.com> <20240330211506.00000b86@yahoo.com> <20240331115438.00003f3c@yahoo.com>

Show all headers | View raw

Michael S <already5chosen@yahoo.com> writes:

> On Sat, 30 Mar 2024 21:15:06 +0300
> Michael S <already5chosen@yahoo.com> wrote:
>
>> On Fri, 29 Mar 2024 23:58:26 -0700
>> Tim Rentsch <tr.17687@z991.linuxsc.com> wrote:
>>
>>> One, the new code is a lot more complicated than the previous
>>> code.  I'm not sure the performance gain is worth the cost
>>> in complexity.  What kind of speed improvements do you see,
>>> in terms of percent?
>>
>> On my 11 y.o.  and not top-of-the-line even then home PC for 4K
>> image (3840 x 2160) with cross-in-cross shape that I took from one of
>> your previous post, it is 2.43 times faster.
>> I don't remember how it compares on more modern systems.  Anyway, right
>> now I have no test systems more modern than 3 y.o.  Zen3.
>
> I tested on newer hardware - Intel Coffee Lake (Xeon-E 2176G) and AMD
> Zen3 (EPYC 7543P).
> Here I no longer see significant drop in speed of the 1x1 variant at 4K
> size, but I still see that more complicated variant provides nice speed
> up.  Up to 1.56x on Coffee Lake and up to 3x on Zen3.

On my test system the numbers are closer and also more evenly
balanced:  ratios range from about 0.70 to about 1.40, roughly
evenly split with the 2x2 version somewhat better.  There was
one outlier at approximately 1.48.  More precisely, the ratios
have an average of 1.06 (which means the 1x1 version is about
6 percent slower on average), with a standard deviation of 0.21.

Back to comp.lang.c | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

Re: filling area by color atack safety Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-03-18 22:42 -0700
  Re: filling area by color atack safety Michael S <already5chosen@yahoo.com> - 2024-03-19 13:18 +0200
    Re: filling area by color atack safety Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2024-03-19 11:57 +0000
      Re: filling area by color atack safety Michael S <already5chosen@yahoo.com> - 2024-03-19 15:49 +0200
        Re: filling area by color atack safety Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-03-19 21:43 -0700
          Re: filling area by color atack safety Michael S <already5chosen@yahoo.com> - 2024-03-20 10:56 +0200
            Re: filling area by color atack safety Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-03-20 06:51 -0700
      Re: filling area by color atack safety Michael S <already5chosen@yahoo.com> - 2024-03-19 19:18 +0200
        Re: filling area by color atack safety fir <fir@grunge.pl> - 2024-03-20 09:27 +0100
          Re: filling area by color atack safety fir <fir@grunge.pl> - 2024-03-20 09:39 +0100
          Re: filling area by color atack safety fir <fir@grunge.pl> - 2024-03-20 09:51 +0100
        Re: filling area by color atack safety Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-03-20 07:27 -0700
          Re: filling area by color atack safety Michael S <already5chosen@yahoo.com> - 2024-03-24 20:27 +0300
            Re: filling area by color atack safety Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-03-24 13:26 -0700
              Re: filling area by color atack safety "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-03-24 14:26 -0700
              Re: filling area by color atack safety Michael S <already5chosen@yahoo.com> - 2024-03-25 01:28 +0300
                Re: filling area by color atack safety Michael S <already5chosen@yahoo.com> - 2024-03-26 17:52 +0200
                Re: filling area by color atack safety Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-03-30 00:54 -0700
                Re: filling area by color atack safety Michael S <already5chosen@yahoo.com> - 2024-03-30 21:26 +0300
                Re: filling area by color atack safety Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-04-09 01:00 -0700
                Re: filling area by color atack safety Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-03-28 23:04 -0700
                Re: filling area by color atack safety Michael S <already5chosen@yahoo.com> - 2024-03-29 15:21 +0200
                Re: filling area by color atack safety Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-03-29 23:58 -0700
                Re: filling area by color atack safety Michael S <already5chosen@yahoo.com> - 2024-03-30 21:15 +0300
                Re: filling area by color atack safety Michael S <already5chosen@yahoo.com> - 2024-03-31 10:54 +0200
                Re: filling area by color atack safety Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-04-09 02:32 -0700
                Re: filling area by color atack safety Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-04-09 01:55 -0700
                Re: filling area by color atack safety Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-03-30 11:59 -0700
        Re: filling area by color atack safety Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-03-20 10:26 -0700
          Re: filling area by color atack safety Michael S <already5chosen@yahoo.com> - 2024-03-21 15:36 +0200
            Re: filling area by color atack safety Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-03-21 09:47 -0700
    Re: filling area by color atack safety Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-03-19 21:40 -0700
      Re: filling area by color atack safety "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-03-19 21:43 -0700
        Re: filling area by color atack safety "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-03-19 21:48 -0700
      Re: filling area by color atack safety Michael S <already5chosen@yahoo.com> - 2024-03-20 11:54 +0200
        Re: filling area by color atack safety Ben Bacarisse <ben.usenet@bsb.me.uk> - 2024-03-20 10:23 +0000
          Re: filling area by color atack safety Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2024-03-20 12:06 +0000
          Re: filling area by color atack safety Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-03-20 07:52 -0700
        Re: filling area by color atack safety Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-03-20 10:01 -0700
          Re: filling area by color atack safety Michael S <already5chosen@yahoo.com> - 2024-03-24 19:33 +0300
            Re: filling area by color atack safety Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-03-24 10:24 -0700
              Re: filling area by color atack safety Michael S <already5chosen@yahoo.com> - 2024-03-25 01:04 +0300
              Re: filling area by color atack safety - worst memory size Michael S <already5chosen@yahoo.com> - 2024-04-05 17:30 +0300
                Re: filling area by color atack safety - worst memory size Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-04-10 19:47 -0700
                Re: filling area by color atack safety - worst memory size Michael S <already5chosen@yahoo.com> - 2024-04-11 15:20 +0300
                Re: filling area by color atack safety - worst memory size Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-04-11 21:06 -0700
                Re: filling area by color atack safety - worst memory size Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-04-11 21:55 -0700
                Re: filling area by color atack safety - worst memory size Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-04-11 22:09 -0700
                Re: filling area by color atack safety - worst memory size Michael S <already5chosen@yahoo.com> - 2024-04-12 11:13 +0300
                Re: filling area by color atack safety - worst memory size Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-04-13 08:30 -0700
                Re: filling area by color atack safety - worst memory size Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-04-11 22:38 -0700
                Re: filling area by color atack safety - worst memory size Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-04-11 22:43 -0700
                Re: filling area by color atack safety - worst memory size Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-04-12 11:59 -0700
                Re: filling area by color atack safety - worst memory size Michael S <already5chosen@yahoo.com> - 2024-04-13 20:26 +0300
                Re: filling area by color atack safety - worst memory size Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-04-13 10:54 -0700
                Re: filling area by color atack safety - worst memory size Michael S <already5chosen@yahoo.com> - 2024-04-13 23:11 +0300
                Re: filling area by color atack safety - worst memory size Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-04-17 10:47 -0700
                Re: filling area by color atack safety - worst memory size Michael S <already5chosen@yahoo.com> - 2024-04-17 22:41 +0300
                Re: filling area by color atack safety - worst memory size Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-04-19 14:59 -0700
                Re: filling area by color atack safety - worst memory size Michael S <already5chosen@yahoo.com> - 2024-04-20 21:10 +0300
                Re: filling area by color atack safety - worst memory size Michael S <already5chosen@yahoo.com> - 2024-04-25 17:56 +0300
                Re: filling area by color atack safety - worst memory size Michael S <already5chosen@yahoo.com> - 2024-05-03 18:33 +0300
                Re: filling area by color atack safety - worst memory size Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-05-15 09:57 -0700

csiph-web