Cycles Baking: 3.x is much slower than 2.93 #94467

New Issue

Grigoriy Titaev · 2021-12-29T16:39:45+01:00

Grigoriy Titaev commented

2021-12-29 16:39:45 +01:00

Blender Version
Broken: 3.0, 3.1 (2021-12-27)
Worked: 2.93.7

Caused by Cycles-X merge

Short description of error
Bake Normal in 3.x is much slower than in 2.93.
3.1 is a bit slower than 3.0.

Time bake normal (2048x2048):

Samples	1	32	64	128
2.93	0:02	0:07	0:11	0:20
3.0	0:03	0:25	0:44	1:21
3.1	0:03	0:27	0:48	1:29
Test CPU: Intel Core i5-3337U

Test Bake Normal (2.93 - 3.x).blend

From #94854:

Short description of error

Exact steps for others to reproduce the error
This follows my other issue which you can find here:
https://developer.blender.org/T94217

It's probably related, but adding this as a separate ticket.

big baking bug.blend

Open up the .blend file in 2.93.5, and press bake, it should have no problem baking. On my machine it uses about 1.8GB of RAM and starts baking within a few seconds, then bakes very quickly, less than a minute.

Then open it in 3.0.0 and press bake, on my machine the RAM shoots up to almost 7GB, then after maybe a minute it starts to bake, then gets stuck at 1% and I'm assuming Cycles crashes, Blender then needs to be killed with extreme prejudice.

This happens no matter what you're trying to bake, it's not just normal maps, it's ANY bake. At the moment ALL my baking has to be done in 2.93.5, before baking I have to close 3.0.0, open the file in 2.93.5 and hit bake.

**Blender Version** Broken: 3.0, 3.1 (2021-12-27) Worked: 2.93.7 Caused by Cycles-X merge **Short description of error** Bake Normal in 3.x is much slower than in 2.93. 3.1 is a bit slower than 3.0. Time bake normal (2048x2048): | Samples | 1 | 32 | 64 | 128 | -- | -- | -- | -- | -- | | 2.93 | 0:02 | 0:07 | 0:11 | 0:20 | 3.0 | 0:03 | 0:25 | 0:44 | 1:21 | 3.1 | 0:03 | 0:27 | 0:48 | 1:29 Test CPU: Intel Core i5-3337U [Test Bake Normal (2.93 - 3.x).blend](https://archive.blender.org/developer/F12780655/Test_Bake_Normal__2.93_-_3.x_.blend) --- From #94854: **Short description of error** **Exact steps for others to reproduce the error** This follows my other issue which you can find here: https://developer.blender.org/T94217 It's probably related, but adding this as a separate ticket. [big baking bug.blend](https://archive.blender.org/developer/F12802406/big_baking_bug.blend) Open up the .blend file in 2.93.5, and press bake, it should have no problem baking. On my machine it uses about 1.8GB of RAM and starts baking within a few seconds, then bakes very quickly, less than a minute. Then open it in 3.0.0 and press bake, on my machine the RAM shoots up to almost 7GB, then after maybe a minute it starts to bake, then gets stuck at 1% and I'm assuming Cycles crashes, Blender then needs to be killed with extreme prejudice. This happens no matter what you're trying to bake, it's not just normal maps, it's ANY bake. At the moment ALL my baking has to be done in 2.93.5, before baking I have to close 3.0.0, open the file in 2.93.5 and hit bake.

Grigoriy Titaev commented

2021-12-29 16:39:45 +01:00

Added subscriber: @gtitaev

blender-admin commented

2021-12-29 16:39:45 +01:00

#94854 was marked as duplicate of this issue

Germano Cavalcante commented

2021-12-30 18:13:53 +01:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2021-12-30 18:13:53 +01:00

Changed status from 'Needs Triage' to: 'Confirmed'

Germano Cavalcante commented

2021-12-30 18:13:53 +01:00

Thanks for the report.
I can confirm the slowness.
The difference seems aggravated the more samples.
Occurred at some point between 8e21d528ca and 7ca48a3814

Thanks for the report. I can confirm the slowness. The difference seems aggravated the more samples. Occurred at some point between `8e21d528ca` and `7ca48a3814`

Philipp Oeser changed title from ~~Bake Normal: 3.x is much slower than 2.93~~ to Cycles Baking: 3.x is much slower than 2.93

2022-01-24 11:28:54 +01:00

Philipp Oeser commented

2022-01-24 11:29:52 +01:00

Added subscribers: @Memm, @lichtwerk, @brecht, @erik85

Memm commented

2022-03-10 11:26:52 +01:00

This is still broken for me in 3.1, and it's not just slower for me, it crashes.
https://developer.blender.org/T94854

This is still broken for me in 3.1, and it's not just slower for me, it crashes. https://developer.blender.org/T94854

Svyatoslav Pavlov commented

2022-04-26 14:19:54 +02:00

Added subscriber: @onikyannn

Svyatoslav Pavlov commented

2022-04-26 14:19:54 +02:00

I can confirm the slowness and crashes on both 3.0 and 3.1.
Before the crash there was 100% RAM consumption.
df_scale_4_lightmap.crash.txt

I can confirm the slowness and crashes on both 3.0 and 3.1. Before the crash there was 100% RAM consumption. [df_scale_4_lightmap.crash.txt](https://archive.blender.org/developer/F13029889/df_scale_4_lightmap.crash.txt)

Philipp Oeser commented

2022-04-26 15:50:54 +02:00

@brecht : will raise priority here since this seems to be a regression from 2.93.
This probably came with 0803119725

@brecht : will raise priority here since this seems to be a regression from 2.93. This probably came with 0803119725

blender-admin commented

2022-04-28 18:29:13 +02:00

This issue was referenced by c722993ef1

This issue was referenced by c722993ef19d6e6a564311f4bdc3cfb214b1474a

Brecht Van Lommel commented

2022-04-28 19:55:27 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Brecht Van Lommel closed this issue

2022-04-28 19:55:27 +02:00

Brecht Van Lommel self-assigned this 2022-04-28 19:55:27 +02:00

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Cycles Baking: 3.x is much slower than 2.93 #94467