POV-Ray: Newsgroups: povray.beta-test: Beta 36--32 vs. 64 bit: Re: Beta 36--32 vs. 64 bit

POV-Ray : Newsgroups : povray.beta-test : Beta 36--32 vs. 64 bit : Re: Beta 36--32 vs. 64 bit		Server Time 2 Jul 2024 10:51:11 EDT (-0400)

From: sevendy
Date: 18 Mar 2010 15:45:01
Message: <web.4ba2753bfe63fe047c707290@news.povray.org>

Thanks for your response.

FYI:

i7-860 2.8GHz, 4 core, 8 "logical" CPU, 8GB RAM (6.5GB available while
rendering, so RAM to spare).  Two cases, both 1024 x 768 AA .3, no radiosity:

                      time in seconds -- elapsed time (total CPU)

                 trace                        Case 1                   Case  2
                threads  CPU(approx.)  photons       no photons       no photons

3.6.2 64bit                 13%           99             31              158

3.6.2 32bit,                13%          209             71              160
    SSE2

3.7 b36 64bit      1        13%       119(119)        36(36)           154(154)
                   4        51%        48(159)        13(51)            53(208)
                   8       100%        37(214)         9(66)            35(270)

3.7 b36 32bit      8       100%        39(228)        10(70)            41(310)


Case 1 is a glass sphere, in front of an image on a plane, illuminated from
above, and casting a shadow on a horizontal plane. Case 2 is a single object
against a distant background.

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