[Bf-committers] 3D rendering time regression

[Brecht Van Lommel]

Hi,

The first jump in that graph can be explained by the area light change, where it now does more shading calculations. The second one I'm not sure, it might be autothreads which was enabled by default around that time. Did you have the threads set to a number other than the number of cpu cores when running the benchmark?

Brecht.

>----- Oorspronkelijk bericht -----
>Van: Giuseppe Ghibò [mailto:ghibo at mandriva.com]
>Verzonden: woensdag, april 23, 2008 06:48 PM
>Aan: 'bf-blender developers'
>Onderwerp: Re: [Bf-committers] 3D rendering time regression
>
>Brecht Van Lommel ha scritto:
>> Hi,
>>
>> Please be more specific about which files are slower. Area lights are now slower because it does more shading, and there is a bug with raytraced refraction + shadows being slow. An issue with QMC raytracing being slow on macs was fixed recently. Issues like this you can report in the bugtracker also, that's much easier to keep track of and follow up for us. Also mention your operating system.
>>
>> Cheers,
>> Brecht.
>>
>>   
>Brecht, the referements for benchmarks made were here:
>
>https://blender.mindrones.com/code/benchmark/rendertime_vs_revisions
>
>As you can see, Luca made tests on a certain number of svn revisions, whose
>rendering time is shown in that plot.
>
>The operating systems used were Linux at 64bit, in particular a mix of 
>MandrivaLinux 2007.0, MandrivaLinux 2007.1
>and MandrivaLinux 2008.1, spawning on dual, quad and dual-quad core 
>either Intel and AMD.
>
>Bye
>Giuseppe.
>
>>> ----- Oorspronkelijk bericht -----
>>> Van: Giuseppe Ghibò [mailto:ghibo at mandriva.com]
>>> Verzonden: vrijdag, april 18, 2008 02:18 PM
>>> Aan: 'bf-blender developers'
>>> Onderwerp: Re: [Bf-committers] 3D rendering time regression
>>>
>>> Giuseppe Ghibò ha scritto:
>>>     
>>>> Anyone has noticed a regression in rendering time with current 2.46-svn 
>>>> against the 2.45?
>>>> I found (using same compiler, same system, same compilation flags) that 
>>>> on average
>>>> the compilation time in multithread (up to 8 threads) has been increased 
>>>>   
>>>>       
>>> Of course I mean "rendering time" not "compilation time" (thanks to luca 
>>> to pointing that out).
>>>     
>>>> of almost a 18-20%
>>>> over 2.45. For the single thread rendering, instead the difference in 
>>>> percentage is smaller.
>>>>
>>>> Bye
>>>> Giuseppe.
>>>>   
>>>>       
>>> Bye
>>> Giuseppe.
>>>
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>>>     
>>
>>
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