Playback slow with large static Text Object #53410

New Issue

Atair-1 · 2017-11-28T09:15:13+01:00

Atair-1 commented

2017-11-28 09:15:13 +01:00

System Information
Windows7 x64, GTX 1070

Blender Version
2.79

When adding a Text object with 100+ words, the animation playback speed goes down to <10fps
It the only value it seems to be related is the 'Preview U' Resolution.

Looks like the Dependency Graph rebuilds the whole Text-Mesh on every frame, even if there is nothing animated.

**System Information** Windows7 x64, GTX 1070 **Blender Version** 2.79 When adding a Text object with 100+ words, the animation playback speed goes down to <10fps It the only value it seems to be related is the 'Preview U' Resolution. Looks like the Dependency Graph rebuilds the whole Text-Mesh on every frame, even if there is nothing animated.

Atair-1 commented

2017-11-28 09:15:13 +01:00

Changed status to: 'Open'

Atair-1 commented

2017-11-28 09:15:13 +01:00

Added subscriber: @Atair-1

ronan ducluzeau commented

2017-11-28 16:36:11 +01:00

Added subscriber: @zeauro

ronan ducluzeau commented

2017-11-28 16:36:11 +01:00

Confirmed on ubuntu with master 7c64e33 and official 2.79

inefficient_text_display.blend

In attached .blend file, I used Lyapunov Texture Template to create a long 3D text object.
At default Preview resolution of 12, it corresponds to 254 193 tris interpolated. At Preview U resolution set at 1, it correspond to 33 973 tris. Of course playback is a little bit better but not great.

And it becomes really unacceptable when draw type is set to Bounds to reduce display of text to a wire of 4 lines : there is no improvement of fps.

Edit; Oops. It looks like problem does not exist when blender is launched with new depsgraph.
By typing in commandline blender --enable-new-depsgraph, there is no more problem.
Is it something that should be supported by legacy depsgraph in 2.79a ?

Confirmed on ubuntu with master 7c64e33 and official 2.79 [inefficient_text_display.blend](https://archive.blender.org/developer/F1218894/inefficient_text_display.blend) In attached .blend file, I used Lyapunov Texture Template to create a long 3D text object. At default Preview resolution of 12, it corresponds to 254 193 tris interpolated. At Preview U resolution set at 1, it correspond to 33 973 tris. Of course playback is a little bit better but not great. And it becomes really unacceptable when draw type is set to Bounds to reduce display of text to a wire of 4 lines : there is no improvement of fps. Edit; Oops. It looks like problem does not exist when blender is launched with new depsgraph. By typing in commandline blender --enable-new-depsgraph, there is no more problem. Is it something that should be supported by legacy depsgraph in 2.79a ?

Atair-1 commented

2017-11-29 01:39:32 +01:00

With the new depsgraph the playback lag is gone, but a new problem is introduced:
Transforming (Moving) The Textobject is now very slow / choppy.
Easily noticeable with 250+ Words
Should this go into a separate task?

With the new depsgraph the playback lag is gone, but a new problem is introduced: Transforming (Moving) The Textobject is now very slow / choppy. Easily noticeable with 250+ Words Should this go into a separate task?

Campbell Barton commented

2017-11-30 06:57:14 +01:00

Changed status from 'Open' to: 'Resolved'

Campbell Barton closed this issue

2017-11-30 06:57:14 +01:00

Campbell Barton commented

2017-11-30 06:58:12 +01:00

Added subscriber: @ideasman42