Grab brush is slowed in 2.71 testbuild2 than in 2.70 #40510

New Issue

gandalf3 · 2014-06-05T23:28:48+02:00

gandalf3 commented

2014-06-05 23:28:48 +02:00

System Information
Archlinux
GTX 460

Blender Version
Broken: testbuild 2 (517094a)
Worked: 2.70 (19e627c)

Short description of error
The grab brush in the testbuild is slow and choppy compared to 2.70, however in 2.70 grabbing and dragging the mesh around (with the sculpting tool) leaves visual artifacts behind. The artifacts disappear after LMB is released.

Exact steps for others to reproduce the error

Open sculpt_grab_lag.blend in 2.70
Click and drag on the edge of the sphere, then move the mouse around a bit
Repeat using testbuild 2.

**System Information** Archlinux GTX 460 **Blender Version** Broken: testbuild 2 (517094a) Worked: 2.70 (19e627c) **Short description of error** The grab brush in the testbuild is slow and choppy compared to 2.70, however in 2.70 grabbing and dragging the mesh around (with the sculpting tool) leaves visual artifacts behind. The artifacts disappear after LMB is released. **Exact steps for others to reproduce the error** 1. Open [sculpt_grab_lag.blend](https://archive.blender.org/developer/F92778/sculpt_grab_lag.blend) in 2.70 2. Click and drag on the edge of the sphere, then move the mouse around a bit 3. Repeat using testbuild 2.

gandalf3 commented

2014-06-05 23:28:48 +02:00

Changed status to: 'Open'

gandalf3 commented

2014-06-05 23:28:48 +02:00

Added subscriber: @gandalf3

Antonis Ryakiotakis was assigned by Sergey Sharybin

2014-06-06 10:30:32 +02:00

Sergey Sharybin commented

2014-06-06 10:30:32 +02:00

Added subscribers: @Psy-Fi, @Sergey

Sergey Sharybin commented

2014-06-06 10:30:32 +02:00

@Psy-Fi, can i have your help here? :)

Antonis Ryakiotakis commented

2014-06-07 22:54:59 +02:00

This sounds very weird to me and I can't see anything of the sort here but I'll do a profile session here to make sure.

gandalf3 commented

2014-06-07 23:06:22 +02:00

It's definitely slower for me (just did a couple more tests).. Is there anything I can do to try and deduce the cause?

Antonis Ryakiotakis commented

2014-06-07 23:21:44 +02:00

Can you load factory settings and see if the issue persists? Then if it doesn't persist anymore can you try changing options to see which one might cause this?

gandalf3 commented

2014-06-07 23:23:33 +02:00

The issue persists with factory settings.

Antonis Ryakiotakis commented

2014-06-07 23:35:21 +02:00

Just a note. This test file is so low poly that you shouldn't be witnessing any slowdowns. I did try on a subdivided sphere but there's no significant difference. Profiling on a subdivided sphere also does not show any striking differences. Even add-ons can sometimes influence performance but I really can't understand why this would be specific to the grab brush.

Antonis Ryakiotakis removed their assignment 2014-06-07 23:39:37 +02:00

Antonis Ryakiotakis commented

2014-06-07 23:39:37 +02:00

I can't help here, I can't reproduce this, profiling shows nothing and nothing comes to mind that would influence the grab brush specifically.

gandalf3 commented

2014-06-07 23:40:50 +02:00

Hm.. I tried it with a high poly cube-sphere and it behaved smooth, and now it's behaving smooth with low poly cube-spheres too..!?

Using the test file is still laggy though.

Hm.. I tried it with a high poly cube-sphere and it behaved smooth, and now it's behaving smooth with low poly cube-spheres too..!? Using the test file is still laggy though.

gandalf3 commented

2014-06-07 23:42:06 +02:00

Your right, the laggyness in the test file is not specific to the grab brush, it seems to affect all the brushes.

And now it's back to being laggy even in new files too. I guess it's just too inconsistent..

Your right, the laggyness in the test file is not specific to the grab brush, it seems to affect all the brushes. And now it's back to being laggy even in new files too. I guess it's just too inconsistent..

Antonis Ryakiotakis commented

2014-06-07 23:46:09 +02:00

Can you disable threaded sculpt in the low poly file and see if it behaves better?

gandalf3 commented

2014-06-07 23:47:40 +02:00

You're right, that does make it behave better.

Antonis Ryakiotakis self-assigned this 2014-06-07 23:48:40 +02:00

blender-admin commented

2014-06-08 00:39:02 +02:00

This issue was referenced by f8f25c38d3

This issue was referenced by f8f25c38d3352c7f480bbf1eba6415f76f62c76e

Antonis Ryakiotakis commented

2014-06-08 00:39:34 +02:00

Changed status from 'Open' to: 'Resolved'

Antonis Ryakiotakis closed this issue

2014-06-08 00:39:34 +02:00

Antonis Ryakiotakis commented

2014-06-08 00:39:34 +02:00

Closed by commit f8f25c38d3.

Closed by commit f8f25c38d3.

Antonis Ryakiotakis commented

2014-06-08 00:41:30 +02:00

Restored threaded sculpting to how it was in 2.70. The weird thing is that the previous behaviour should have more overhead in that simple case. Anyway, we'll see how this behaves, if it's still not fixed we'll reopen.

gandalf3 commented

2014-06-08 23:43:11 +02:00

It just tested with f8f25c3, and it seems to be working fine.

Thanks! :)

It just tested with f8f25c3, and it seems to be working fine. Thanks! :)

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Grab brush is slowed in 2.71 testbuild2 than in 2.70 #40510