Displaying/loading of the matcap thumbnails in the UI became a lot slower #81777

New Issue

TheRedWaxPolice · 2020-10-16T17:17:39+02:00

TheRedWaxPolice commented

2020-10-16 17:17:39 +02:00

System Information
Operating system: Win 10

Blender Version
Broken: (example: blender-2.91.0-ba8233174cd7-windows64
Worked: 2.81 (probably 2.82 and 2.83 too, but I don't have those versions to test)

Short description of error
The displaying/loading of the matcap thumbnails in the UI became a lot slower in the latest versions of blender, compared to the old versions...

Exact steps for others to reproduce the error
Please check the video comparison (left 2.91, right 2.81)

2020-10-13_19-26-33.mp4

**System Information** Operating system: Win 10 **Blender Version** Broken: (example: blender-2.91.0-ba8233174cd7-windows64 Worked: 2.81 *(probably 2.82 and 2.83 too, but I don't have those versions to test)* **Short description of error** The displaying/loading of the matcap thumbnails in the UI became a lot slower in the latest versions of blender, compared to the old versions... **Exact steps for others to reproduce the error** Please check the video comparison (left 2.91, right 2.81) [2020-10-13_19-26-33.mp4](https://archive.blender.org/developer/F8999967/2020-10-13_19-26-33.mp4)

TheRedWaxPolice commented

2020-10-16 17:17:39 +02:00

Added subscriber: @TheRedWaxPolice

Richard Antalik commented

2020-10-20 04:54:13 +02:00

Added subscriber: @iss

Richard Antalik commented

2020-10-20 04:54:13 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Richard Antalik commented

2020-10-20 04:54:13 +02:00

I can't reproduce this.

Please click on Help > Report a Bug to report bugs. This report is missing information about your hardware.
Aslo click on Help > Save System Info and upload saved file.

I can't reproduce this. Please click on Help > Report a Bug to report bugs. This report is missing information about your hardware. Aslo click on Help > Save System Info and upload saved file.

TheRedWaxPolice commented

2020-10-20 07:37:11 +02:00

@iss Hi, this test was on a laptop...

Here's the file you asked:
system-info.txt
By the way, I downloaded the versions 2.83 LTS and the stable 2.90.1 to do a quick comparison, and yes, 2.83 is still running fine. So this slowdown was definitely introduced in 2.90. And in 2.91 it got a little bit worse, since it seems to be a little more slower than 2.90.1

@iss Hi, this test was on a laptop... Here's the file you asked: [system-info.txt](https://archive.blender.org/developer/F9020799/system-info.txt) By the way, I downloaded the versions **2.83 LTS** and the stable **2.90.1** to do a quick comparison, and yes, **2.83** is still running fine. So this slowdown was definitely introduced in **2.90**. And in **2.91** it got a little bit worse, since it seems to be a little more slower than 2.90.1

Richard Antalik commented

2020-10-20 07:58:04 +02:00

I see you are using very old GPU drivers, please download latest and re-check.
Do you have another machine to check this issue?

I see you are using very old GPU drivers, please download latest and re-check. Do you have another machine to check this issue?

TheRedWaxPolice commented

2020-10-20 08:38:25 +02:00

I can't test on other machines at the moment, but doesn't seem like a driver issue. I'll see..
Did you made a side by side comparison between 2.83 and 2.91? Also you need a good amount of matcaps installed to be able to notice the slowdown more easily.

I can't test on other machines at the moment, but doesn't seem like a driver issue. I'll see.. Did you made a side by side comparison between 2.83 and 2.91? Also you need a good amount of matcaps installed to be able to notice the slowdown more easily.

TheRedWaxPolice commented

2020-10-20 09:25:27 +02:00

Just in case it's not clear, this slow loading only happens once, when you open the matcap panel for the first time after launching blender..

Yevgeny Makarov commented

2020-10-20 09:34:08 +02:00

Added subscriber: @jenkm

Yevgeny Makarov commented

2020-10-20 09:34:08 +02:00

@TheRedWaxPolice - to make the experiment clean, make sure that your MatCaps folders are identical.

Also, check the memory usage, it might be related to #79698 #80463.

@TheRedWaxPolice - to make the experiment clean, make sure that your MatCaps folders are identical. Also, check the memory usage, it might be related to #79698 #80463.

TheRedWaxPolice commented

2020-10-20 16:48:05 +02:00

@jenkm

In #81777#1037587, @jenkm wrote:
@TheRedWaxPolice - to make the experiment clean, make sure that your MatCaps folders are identical.

Yeah sure, that's what I did on my last test with 2.83 against 2.90/2.91...

Also, check the memory usage, it might be related to #79698 #80463.

The memory usage definitely needs some serious optimizations, I even asked Harley the other day on blenderchat about this issue https://blender.chat/channel/user-interface-module?msg=rY2p3u3gJ39oND3Ra but this seems to be an entirely separate issue...

@jenkm > In #81777#1037587, @jenkm wrote: > @TheRedWaxPolice - to make the experiment clean, make sure that your MatCaps folders are identical. Yeah sure, that's what I did on my last test with 2.83 against 2.90/2.91... > Also, check the memory usage, it might be related to #79698 #80463. The memory usage definitely needs some serious optimizations, I even asked Harley the other day on blenderchat about this issue https://blender.chat/channel/user-interface-module?msg=rY2p3u3gJ39oND3Ra but this seems to be an entirely separate issue...

Richard Antalik commented

2020-10-21 06:09:35 +02:00

I rechecked this and I can see different performance, in my though I see only 1.4ms difference per thumbnail. So I would need to load about 100 matcaps to barely notice any difference when checking in sequence.

I have tested this with default set, perhaps this difference per matcap gets worse with number of matcaps?

I rechecked this and I can see different performance, in my though I see only 1.4ms difference per thumbnail. So I would need to load about 100 matcaps to barely notice any difference when checking in sequence. I have tested this with default set, perhaps this difference **per matcap** gets worse with number of matcaps?

TheRedWaxPolice commented

2020-10-21 06:27:57 +02:00

I'm not sure.
I have 92 custom matcaps installed + the default set. If you could duplicate the default set to roughly the same amount that I have, I believe it will be easier to spot the difference. In 2.83 loads pretty fast.

I'm not sure. I have 92 custom matcaps installed + the default set. If you could duplicate the default set to roughly the same amount that I have, I believe it will be easier to spot the difference. In 2.83 loads pretty fast.

Richard Antalik commented

2020-10-22 18:32:40 +02:00

Changed status from 'Needs User Info' to: 'Needs Triage'

Richard Antalik commented

2020-10-22 18:32:40 +02:00

I have tried this again with 50 another matcaps, this time I have got difference that is order of magnitude worse, but still only about 20ms per matcap. That is still not comparable to your result, so I don't think it will be same issue.

Richard Antalik commented

2020-10-22 18:59:02 +02:00

Added subscriber: @Jeroen-Bakker

Richard Antalik commented

2020-10-22 18:59:02 +02:00

@Jeroen-Bakker Can you check if you can reproduce this issue? I have looked at studiolight.c if there is any smoking gun, but I can't see anything really, but you seem to be familiar with this system so perhaps you know what could be an issue here.

@Jeroen-Bakker Can you check if you can reproduce this issue? I have looked at `studiolight.c` if there is any smoking gun, but I can't see anything really, but you seem to be familiar with this system so perhaps you know what could be an issue here.

Pratik Borhade commented

2022-02-17 12:49:47 +01:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2022-02-17 12:49:47 +01:00

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

Pratik Borhade commented

2022-02-17 12:49:47 +01:00

@TheRedWaxPolice hi, I tested the described problem. I saw noticeable difference when loading thumbnails on different Blender versions
Loading thumbnails in 3.2 seems much better than 2.92. And as said in the original report it's faster on 2.83 (took ~6s to load all thumbnails)
While 3.2 took ~8s and 2.92 ~12sec
I think performance improvements are usually not considered as bug (unless they are regression)
Will let developers decide about the situation of this report
Test file:
matcaps.rar

@TheRedWaxPolice hi, I tested the described problem. I saw noticeable difference when loading thumbnails on different Blender versions Loading thumbnails in 3.2 seems much better than 2.92. And as said in the original report it's faster on 2.83 (took ~6s to load all thumbnails) While 3.2 took ~8s and 2.92 ~12sec I think performance improvements are usually not considered as bug (unless they are regression) Will let developers decide about the situation of this report Test file: [matcaps.rar](https://archive.blender.org/developer/F12871189/matcaps.rar)

TheRedWaxPolice commented

2022-02-17 19:28:12 +01:00

@PratikPB2123 I think we can safely achive this report for now. I did some tests again and it seems that things are not as bad as before in the latest builds...

Pratik Borhade commented

2022-02-18 05:17:46 +01:00

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

Pratik Borhade closed this issue

2022-02-18 05:17:46 +01:00

Pratik Borhade commented

2022-02-18 05:17:46 +01:00

Ok, will close. Thanks for the report.

Developers: Please reopen the ticket if more improvement is expected.

Ok, will close. Thanks for the report. Developers: Please reopen the ticket if more improvement is expected.

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Displaying/loading of the matcap thumbnails in the UI became a lot slower #81777