Subdivision modifier slower than Blender2.79 non-OpenSubDiv in edit mode #70826
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Reference: blender/blender#70826
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System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: Radeon RX 580 Series ATI Technologies Inc. 4.5.13571 Core Profile Context 19.9.2 26.20.13003.1007
Blender Version
Broken: version: 2.81 (sub 15), branch: master, commit date: 2019-10-12 15:33, hash:
95f020c853Worked: Blender 2.79
I created this bug report at Sergey's request in devtalk.
Short description of error
Blender Subdivision modifier slower in different edit modes compare with blender2.79 Non-OpenSubDiv subdivision, No matter if the mesh is created entirely from quads, triangles or ngons. also it appear that needs a "start" time to activate the subdivision or when you move the vertex, something that didn't happen with 2.79 subdivision.
Exact steps for others to reproduce the error
Open the shared files to test different conditions. The results in my test are
EDIT MODE mesh with quads
2019-10-11 13-14-38.mp4
Lattice
2.mp4
Armature mesh only with quads
Test_edit.blend
Test_lattice.blend
Test_armature.blend
Test_wheel.blend
Also I provided other mesh file that show strange behaviors that I comment in next comment.
This problem is a extreme regression since it made impossible to work with blender2.80 with hard-surfaces, animation characters,... Specially when the undo-Z can need 4-5 seconds only when the scene have some subdivision objects and this problem disappear when you deactivate the subdivision.
Added subscriber: @AlbertoVelazquez
#68469 was marked as duplicate of this issue
#70972 was marked as duplicate of this issue
Side effects of the actual subdivision.
2019-10-11 14-15-05.mp4
2019-10-11 14-32-27.mp4
Added subscriber: @Sergey
Added subscriber: @kosblend
Please never report two issues under the same task. Make a separate one for this.
Also try to explain what exactly wrong in a plain text. Simply uploading videos doesn't add that much value.
The edit mode performance i'll have a look into.
@AlbertoVelazquez, what is your CPU?
@Sergey I have two CPUs, intel i7 4790 and amd ryzen 3700x, videos recorded in the Ryzen. I can also test it in other intel i7 and a old quad core.
There are some threading scheduler issues i've found. Working on solving them.
This isn't limited to the edit mode though (at least not as long as topology stays the same).
Added subscribers: @Hyesung, @LazyDodo, @dark999
Added subscribers: @YegorSmirnov, @mano-wii, @RORU, @JacquesLucke
Added subscriber: @dfelinto
Changed status from 'Confirmed' to: 'Resolved'
The threading scheduler is already in master (upcoming 2.82), so the daily builds should already show a better performance. So all the known issues on that are fixed. If the problem persist with a recent build builder.blender.org please report a new issue.
Added subscriber: @youthatninja
140 faces and bevel modifier + subd lvl 2
Performance as in 2.80
Blender version: 2.82 release
I don’t see any substantial improvements in 2.82.7
Playback is incredibly slow when the Subdivision modifier is applied to a mesh with animated shapes or bones.
In 2.79 and Maya it is tens of times faster.
2.82.7:
https://youtu.be/csYeyNDWyxE
Maya:
https://youtu.be/hiX8bCpOwzE
2.79:
https://youtu.be/CnLUnFdQ38s
https://youtu.be/dzIl_S-qHIQ
In this video you can see the speed reached in 2014 on Blender. Was the same test done in 2.8?