Decline in performance, an increase of over 209% in the rendering #51154
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Reference: blender/blender#51154
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System Information
Lubuntu 16.04 Intel HD 5500
Ram 4GB
Blender Version
Broken: ( 2.78.4
d426c335c5)Worked: (2.78c
e92f235283)Hi, with the latest build there was a noticeable decrease in performance, I hope you all come back as fast as before.
Changed status to: 'Open'
Added subscriber: @pafurijaz-4
Added subscriber: @mib2berlin
Hi, can you please add your test file?
Did you check with official benchmark files from blender.org?
https://www.blender.org/download/demo-files/
Mib
Here the test with the BMW model, even with this scene shows a considerable increase in the rendering time with CPU.
CPU Blender : 2.78c
e92f235283RenderTime 24:02.50
CPU Blender : 2.78.4
d426c335c5RenderTime 42:40.21
While with my little GTX750Ti there is a slight increase in speed.
GPU Blender : 2.78c
e92f235283RenderTime 09:32.60
GPU Blender : 2.78.4
d426c335c5RenderTime 08:56.60
Added subscriber: @Blendify
Can you please attach your system info?
Blender --> Info Editor --> Help --> System info.
Looking at our own tests: https://brechtvl.github.io/cycles-ci/ there is not that big of a slow down maybe ~5seconds so the bug might be with a particular cpu kernel.
Here the details of my system.
system-info.txt
hmm... CPU device capabilities returned nothing. Can you try with factory settings, both testing performance and the system-info?
Added subscriber: @brecht
Factory settings doesn't affect CPU device capabilities as far as I know.
This is using a 32bit daily build, I guess the 2.78c you're comparing with was also 32 bit? If so, perhaps it's related to
ced8fff5de.@brecht Hi, I don't use a 32bit version, below the test asked me to do, with factory settings and info.
system-info.txt
The system info indicates you are using a 32 bit version (i686) though, so I think you might have downloaded the wrong build from builder.blender.org?
@brecht you're right, now I download the new of today, do not know how the hell did I go wrong, I'm sorry to have made you waste time unnecessarily I apologize strongly.
Changed status from 'Open' to: 'Resolved'
No problem, thanks for testing. Still kind of interesting that the 32 bit build is so much slower.