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Maniphest T63249

F12 Cycles render 8x slower than the same render started from commandline
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Description

System Information
Operating system: Ubuntu 18.04 64bit
Graphics card: GeForce GTX TITAN X (GM200), GeForce GTX 1080 Mobile (same behavior on both)

Blender Version
Broken: 2.80beta 17c15798c35f, 2.79b (same behavior with both)

Short description of error
When I start render from commanline, it is about eight times faster than the same render started by pressing F12 in Blender GUI.

Exact steps for others to reproduce the error
Try to open attached scene and run render by F12. Then try it from commanline by running

blender -b zzTmp-render-test2.blend -f 1

zzTmp-render-test2.blend4 MBDownload

Related Objects

Event Timeline

Vaclav Cermak (disnel) created this task.Apr 3 2019, 3:48 PM
Vaclav Cermak (disnel) removed a project: Add-ons (Community).Apr 3 2019, 3:52 PM
Vaclav Cermak (disnel) added projects: BF Blender: 2.8, BF Blender.
Sebastian Parborg (zeddb) added subscribers: Brecht Van Lommel (brecht), Sebastian Parborg (zeddb).Apr 3 2019, 5:02 PM

This is not that odd, right @Brecht Van Lommel (brecht)?

Suyash Singh (tnt-man) added a subscriber: Suyash Singh (tnt-man).EditedApr 3 2019, 6:17 PM

maybe because in blender it also shows the image

Brecht Van Lommel (brecht) lowered the priority of this task from 90 to 30.EditedApr 3 2019, 6:19 PM
  • Does it help to select GLSL under Preferences > Viewport > Textures > Image Display Method?
  • Does it help to hide the image editor showing the render?
Vaclav Cermak (disnel) added a comment.Apr 3 2019, 6:19 PM

So displaying image takes about seven times its render time?

Vaclav Cermak (disnel) added a comment.Apr 3 2019, 6:23 PM

2 Brecht>

  • No
  • Seems that no. Tried to switch from image editor to 3D view and after some time back. Remaining render time didn't improved.
Benjamin Meyer (Anvilarion) added a subscriber: Benjamin Meyer (Anvilarion).Apr 3 2019, 6:25 PM
Benjamin Meyer (Anvilarion) removed a subscriber: Benjamin Meyer (Anvilarion).
Bastien Montagne (mont29) raised the priority of this task from 30 to 90.Apr 11 2019, 12:24 PM
Juan Gea (juang3d) awarded a token.May 10 2019, 10:14 AM
Sebastian Parborg (zeddb) added a comment.Jun 11 2019, 12:30 PM

@Brecht Van Lommel (brecht) do you want to take a look at this?

Maciej Jutrzenka (Kramon) changed the task status from Unknown Status to Unknown Status.Nov 26 2019, 5:02 PM
Maciej Jutrzenka (Kramon) claimed this task.
Maciej Jutrzenka (Kramon) added a subscriber: Maciej Jutrzenka (Kramon).

did multiple projects in 2.81 where blendfile was over 2gb and didn't had such issiues.. i am closeing probably it got fixed over the time...