"Make single user -> object & data" is extremely(!) slow in Blender 3.1, compared to previous versions #96330

New Issue

Christoph Werner · 2022-03-11T11:57:22+01:00

Christoph Werner commented

2022-03-11 11:57:22 +01:00

System Information
platform: 'Windows-10-10.0.19044-SP0'
renderer: 'NVIDIA GeForce RTX 3090/PCIe/SSE2'
version: '4.5.0 NVIDIA 511.79'

Broken in version: 3.1.0, branch: master, commit date: 2022-03-08 18:16, hash: c77597cd0e, type: release
build date: 2022-03-09, 00:44:13

Worked: 3.0.1

Short description of error
The following issue happens in scenes with dozen thousands of objects.
When using menu Object -> Relations -> Make single user -> object & data Blender 3.1 needs extremely long time to create single user data of instanced objects.
In Blender 3.0.1 the same task just needs a few seconds.

Exact steps for others to reproduce the error
Please use the attached test .blend file.

Select all objects.
Go into the menu and activate Object -> Relations -> Make single user -> object & data

Blender needs a very long time to create single users in version 3.1.
The same task needs less than a 3rd of the time in Blender 3.0.1.

I'm working regularly with CAD data scenes that very often include more than 20-30k objects.
Why is this so slow now?

Regards
Chris

cw_make_lokal_bug.blend

**System Information** platform: 'Windows-10-10.0.19044-SP0' renderer: 'NVIDIA GeForce RTX 3090/PCIe/SSE2' version: '4.5.0 NVIDIA 511.79' Broken in version: 3.1.0, branch: master, commit date: 2022-03-08 18:16, hash: c77597cd0e15, type: release build date: 2022-03-09, 00:44:13 Worked: 3.0.1 **Short description of error** The following issue happens in scenes with dozen thousands of objects. When using menu *Object -> Relations -> Make single user -> object & data* Blender 3.1 needs extremely long time to create single user data of instanced objects. In Blender 3.0.1 the same task just needs a few seconds. **Exact steps for others to reproduce the error** Please use the attached test .blend file. 1. Select all objects. 2. Go into the menu and activate *Object -> Relations -> Make single user -> object & data* Blender needs a very long time to create single users in version 3.1. The same task needs less than a 3rd of the time in Blender 3.0.1. I'm working regularly with CAD data scenes that very often include more than 20-30k objects. Why is this so slow now? Regards Chris [cw_make_lokal_bug.blend](https://archive.blender.org/developer/F12921026/cw_make_lokal_bug.blend)

Christoph Werner commented

2022-03-11 11:57:22 +01:00

Added subscriber: @ChristophWerner

Christoph Werner changed title from ~~Using "Make single user -> object & data" is extremely(!) slow in Blender 3.1, compared to previous versions~~ to "Make single user -> object & data" is extremely(!) slow in Blender 3.1, compared to previous versions

2022-03-11 11:57:38 +01:00

Germano Cavalcante commented

2022-03-11 20:50:20 +01:00

Added subscribers: @mont29, @mano-wii

Germano Cavalcante commented

2022-03-11 20:50:20 +01:00

Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'

Germano Cavalcante commented

2022-03-11 20:50:20 +01:00

I can confirm.
The operation goes from about 15 seconds to 45 seconds using the attached file.
Regression was introduced in 43bc494892.
@mont29, is the performance penalty expected? Can this operation be optimized to something close to what it was before?

I can confirm. The operation goes from about 15 seconds to 45 seconds using the attached file. Regression was introduced in 43bc494892. @mont29, is the performance penalty expected? Can this operation be optimized to something close to what it was before?

Christoph Werner commented

2022-03-16 16:46:10 +01:00

Sorry for the unproductive comment guys, but I move back to Blender 3.0.1 because of the slowdown.
This issue is really annoying for my daylie work. I hope it will be fixed soon.

Sorry for the unproductive comment guys, but I move back to Blender 3.0.1 because of the slowdown. This issue is really annoying for my daylie work. I hope it will be fixed soon.

Bastien Montagne commented

2022-03-17 12:06:53 +01:00

This code needs to be moved to new 'multiple' relink code committed yesterday, change almost ready here, will commit later today.

Note that the change will only be available in master/daily builds/future 3.2 release though.

This code needs to be moved to new 'multiple' relink code committed yesterday, change almost ready here, will commit later today. Note that the change will only be available in master/daily builds/future 3.2 release though.

Christoph Werner commented

2022-03-17 13:28:17 +01:00

In #96330#1324629, @mont29 wrote:
This code needs to be moved to new 'multiple' relink code committed yesterday, change almost ready here, will commit later today.

Note that the change will only be available in master/daily builds/future 3.2 release though.

Thank you. What a shame. Because we don't update "very often" to new Blender versions while running productions, I hoped to see this patch already in 3.1.1.
Will the new commited solution be faster then the previous ones?

> In #96330#1324629, @mont29 wrote: > This code needs to be moved to new 'multiple' relink code committed yesterday, change almost ready here, will commit later today. > > Note that the change will only be available in master/daily builds/future 3.2 release though. Thank you. What a shame. Because we don't update "very often" to new Blender versions while running productions, I hoped to see this patch already in 3.1.1. Will the new commited solution be faster then the previous ones?

Germano Cavalcante commented

2022-03-17 13:39:37 +01:00

Changed status from 'Needs Developer To Reproduce' to: 'Confirmed'

blender-admin commented

2022-03-17 15:08:43 +01:00

This issue was referenced by 17906794f5

This issue was referenced by 17906794f555fb8452d677d7db576e78b7a115a6

Bastien Montagne commented

2022-03-17 15:11:45 +01:00

Changing version during production is never really recommended... and backporting this change (and the ones it depends on) to 3.1 is a no-go, would be way too risky for a fix-only release.

Bastien Montagne commented

2022-03-17 17:25:11 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Bastien Montagne closed this issue

2022-03-17 17:25:11 +01:00

Bastien Montagne self-assigned this 2022-03-17 17:25:11 +01:00

Christoph Werner commented

2022-03-18 10:11:25 +01:00

In #96330#1324754, @mont29 wrote:
Changing version during production is never really recommended... and backporting this change (and the ones it depends on) to 3.1 is a no-go, would be way too risky for a fix-only release.

Indeed. So this patch seem to be "something bigger". No problem. I understand this and wait for 3.2.

Best wishes
Chris

> In #96330#1324754, @mont29 wrote: > Changing version during production is never really recommended... and backporting this change (and the ones it depends on) to 3.1 is a no-go, would be way too risky for a fix-only release. Indeed. So this patch seem to be "something bigger". No problem. I understand this and wait for 3.2. Best wishes Chris

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"Make single user -> object & data" is extremely(!) slow in Blender 3.1, compared to previous versions #96330