VSE: Empty sequence plays 100+ fps in 2.90 and only 20+ in 2.91 #82259

New Issue

tintwotin · 2020-10-30T16:46:21+01:00

tintwotin commented

2020-10-30 16:46:21 +01:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: Intel(R) UHD Graphics 600 Intel 4.5.0 - Build 27.20.100.8853

Blender Version
Broken: version: 2.92.0 Alpha, branch: master, commit date: 2020-10-28 23:40, hash: cac8a7cddb
Worked: 2.79
I noticed a drop in performance from 700 to 600fps with the f15d33d585

Short description of error

2.79: 100+ fps.
2.90: 100-170 fps.
2.91: 30-45 fps.
2.92: 20-25 fps.

Empty sequence plays 100+ fps in 2.79 and only 20+ in 2.92(cache on/off makes no difference) as seen in this gif:
{F9134072, size=full}

To test:
In 2.79 change to fps to a high number your hardware is struggling to play.
Note the fps when playing back an empty sequence.
Save the file.
Open that file in 2.92.
Note the fps, when playing the empty sequence.

I get a huge difference in fps.

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: Intel(R) UHD Graphics 600 Intel 4.5.0 - Build 27.20.100.8853 **Blender Version** Broken: version: 2.92.0 Alpha, branch: master, commit date: 2020-10-28 23:40, hash: `cac8a7cddb` Worked: 2.79 I noticed a drop in performance from 700 to 600fps with the f15d33d585 **Short description of error** 2.79: 100+ fps. 2.90: 100-170 fps. 2.91: 30-45 fps. 2.92: 20-25 fps. Empty sequence plays 100+ fps in 2.79 and only 20+ in 2.92(cache on/off makes no difference) as seen in this gif: {[F9134072](https://archive.blender.org/developer/F9134072/fps.gif), size=full} To test: In 2.79 change to fps to a high number your hardware is struggling to play. Note the fps when playing back an empty sequence. Save the file. Open that file in 2.92. Note the fps, when playing the empty sequence. I get a huge difference in fps.

tintwotin commented

2020-10-30 16:46:21 +01:00

Added subscriber: @tintwotin

Richard Antalik commented

2020-10-30 17:11:05 +01:00

Added subscriber: @iss

Richard Antalik commented

2020-10-30 17:11:05 +01:00

I can't reproduce this. I get even better performance in 2.92.

Is this problem introduced in 2.92?

I can't reproduce this. I get even better performance in 2.92. Is this problem introduced in 2.92?

tintwotin commented

2020-10-30 23:07:39 +01:00

Checking the same file with nothing in it created in 2.79, these are the numbers for 4 different Blender versions:

2.79: 100+ fps.
2.90: 100-170 fps.
2.91: 30-45 fps.
2.92: 20-25 fps.

The gif from above shows 2.79 and 2.92:
{F9134072, size=full}

This gif shows 2.90 and 2.91:
{F9135833, size=full}

With edited material I also see a big jump from 20-25 fps in 2.90 to 8-9 fps in 2.91 of fully cached material. 2.91 and 2.92 seems similar with this material: 8-9 fps.

So something must have made the fps of the VSE drop significantly between 2.90 and 2.91.

Checking the same file with nothing in it created in 2.79, these are the numbers for 4 different Blender versions: 2.79: 100+ fps. 2.90: 100-170 fps. 2.91: 30-45 fps. 2.92: 20-25 fps. The gif from above shows 2.79 and 2.92: {[F9134072](https://archive.blender.org/developer/F9134072/fps.gif), size=full} This gif shows 2.90 and 2.91: {[F9135833](https://archive.blender.org/developer/F9135833/fps_90_91.gif), size=full} With edited material I also see a big jump from 20-25 fps in 2.90 to 8-9 fps in 2.91 of fully cached material. 2.91 and 2.92 seems similar with this material: 8-9 fps. So something must have made the fps of the VSE drop significantly between 2.90 and 2.91.

tintwotin changed title from ~~VSE: Empty sequence plays 100+ fps in 2.79 and only 20+ in 2.92~~ to VSE: Empty sequence plays 100+ fps in 2.90 and only 20+ in 2.91

2020-10-31 00:39:39 +01:00

Richard Antalik commented

2020-11-02 22:38:40 +01:00

Seeing that other GPU related reports are still open, this could be another one. Unfortunately I can't really help there. Also chance of having developer with exact same hardware to bisect bad commit is not high when we support up to 10 year old hardware.

tintwotin commented

2020-11-03 10:48:06 +01:00

Anyone else notice a regression in the playback fps of the empty timeline on their hardware, between 2.90 and 2.91?
2.90: download.blender.org/release/
2.91: builder.blender.org/download/
If you do, please write here what hardware you're using.

Anyone else notice a regression in the playback fps of the empty timeline on their hardware, between 2.90 and 2.91? 2.90: download.blender.org/release/ 2.91: builder.blender.org/download/ If you do, please write here what hardware you're using.

tintwotin commented

2020-11-03 12:17:35 +01:00

Playing the empty sequencer-timeline in 1.30 minutes in this example will also make the fps drop from 60 fps to 30 fps. Render rate was set to 200 fps and range to 100000: {F9180517,size=full}

Playing the empty sequencer-timeline in 1.30 minutes in this example will also make the fps drop from 60 fps to 30 fps. Render rate was set to 200 fps and range to 100000: {[F9180517](https://archive.blender.org/developer/F9180517/fps_drop.gif),size=full}

Andrea Monzini commented

2020-11-03 13:40:38 +01:00

Added subscriber: @AndreaMonzini

Andrea Monzini commented

2020-11-03 13:40:38 +01:00

Hello,
in my system max playback is locked to 60 fps in 2.79, 2.80 and 2.90.1 but it appears the same ( i tried 180-240 fps in the Output Properties, disabled AV-Sync )

GNU/Linux - Pop!_OS 20.04 - Ryzen 1700 @3700 - AMD RX 580 AMDGPU/Mesa - 32 GB RAM

In the X.org settings i have:

Option "TearFree" "on"

so maybe the V-Sync max is 60 HZ

Hello, in my system max playback is locked to 60 fps in 2.79, 2.80 and 2.90.1 but it appears the same ( i tried 180-240 fps in the Output Properties, disabled AV-Sync ) GNU/Linux - Pop!_OS 20.04 - Ryzen 1700 @3700 - AMD RX 580 AMDGPU/Mesa - 32 GB RAM In the X.org settings i have: ``` Option "TearFree" "on" ``` so maybe the V-Sync max is 60 HZ

Germano Cavalcante commented

2020-11-03 20:02:14 +01:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2020-11-03 20:02:14 +01:00

I notice a reduction in fps, but nothing compared to the one shown in the video:
Blender 2.79: 460~500fps
Blender 2.90: 700~750fps
Blender 2.92: 510~550fps

The regression was introduced in some commit between deb76548c1 and 6fe609d4c3.

I notice a reduction in fps, but nothing compared to the one shown in the video: Blender 2.79: 460~500fps Blender 2.90: 700~750fps Blender 2.92: 510~550fps The regression was introduced in some commit between `deb76548c1` and `6fe609d4c3`.

Germano Cavalcante commented

2020-11-03 22:24:50 +01:00

I noticed a drop in performance from 700 to 600fps with the f15d33d585
But I don't know if it's related to the problem reported.

I noticed a drop in performance from 700 to 600fps with the f15d33d585 But I don't know if it's related to the problem reported.

tintwotin commented

2020-11-04 10:31:08 +01:00

In #82259#1047522, @mano-wii wrote:
I noticed a drop in performance from 700 to 600fps with the f15d33d585
But I don't know if it's related to the problem reported.

Yes, good find, I notice a drop from 60 fps to 50 fps without this patch, but without this patch it still isn't yet at the level of 2.90.

> In #82259#1047522, @mano-wii wrote: > I noticed a drop in performance from 700 to 600fps with the f15d33d585 > But I don't know if it's related to the problem reported. Yes, good find, I notice a drop from 60 fps to 50 fps without this patch, but without this patch it still isn't yet at the level of 2.90.

tintwotin commented

2020-11-16 12:47:18 +01:00

Added subscriber: @Jeroen-Bakker

tintwotin commented

2020-11-16 12:47:18 +01:00

@Jeroen-Bakker Are you aware of this? ^

Philipp Oeser commented

2020-11-25 17:08:14 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2020-11-25 17:08:14 +01:00

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

Philipp Oeser commented

2020-11-25 17:08:14 +01:00

Triaging team has done everything it can it seems, it is now up to @Jeroen-Bakker to decide how to classify this.

Richard Antalik commented

2021-01-08 08:58:09 +01:00

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

Richard Antalik closed this issue

2021-01-08 08:58:09 +01:00

Richard Antalik commented

2021-01-08 08:58:09 +01:00

I can confirm regression in f15d33d585, but that was reverting change because optimization caused problems. So I will close this report.

I can confirm regression in f15d33d585, but that was reverting change because optimization caused problems. So I will close this report.

tintwotin self-assigned this 2021-06-15 17:55:49 +02:00

tintwotin commented

2021-06-15 18:00:49 +02:00

@iss Imo, this should be reopened. In the 3.0 Alpha, I only get 30 fps on an empty timeline, compared to 100 fps in 2.79.
{F10172897,size=full}

@iss Imo, this should be reopened. In the 3.0 Alpha, I only get 30 fps on an empty timeline, compared to 100 fps in 2.79. {[F10172897](https://archive.blender.org/developer/F10172897/30fps.gif),size=full}

tintwotin removed their assignment 2021-06-15 18:01:22 +02:00

Richard Antalik commented

2021-06-16 00:54:25 +02:00

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

Richard Antalik reopened this issue

2021-06-16 00:54:25 +02:00

Richard Antalik commented

2021-06-16 00:54:26 +02:00

In #82259#1177247, @tintwotin wrote:
@iss Imo, this should be reopened. In the 3.0 Alpha, I only get 30 fps on an empty timeline, compared to 100 fps in 2.79.

Do you think this is caused by 7b76a160a4?
Can you add color strip after end frame and animate color? Is it still playing at 30fps?

> In #82259#1177247, @tintwotin wrote: > @iss Imo, this should be reopened. In the 3.0 Alpha, I only get 30 fps on an empty timeline, compared to 100 fps in 2.79. Do you think this is caused by 7b76a160a4? Can you add color strip after end frame and animate color? Is it still playing at 30fps?

Philipp Oeser commented

2021-07-15 14:04:04 +02:00

@tintwotin : poke ^

tintwotin commented

2021-07-15 14:12:28 +02:00

Blender Version
Broken: version: 2.92.0 Alpha, branch: master, commit date: 2020-10-28 23:40, hash: cac8a7cddb

This was happening before 7b76a160a4 (and is still happening with the latest master).

I'm getting a max of 40 fps with an empty timeline and same thing with an animated color strip.

2.90: 100-170 fps.

> Blender Version > Broken: version: 2.92.0 Alpha, branch: master, commit date: 2020-10-28 23:40, hash: cac8a7cddb This was happening before 7b76a160a4 (and is still happening with the latest master). I'm getting a max of 40 fps with an empty timeline and same thing with an animated color strip. > 2.90: 100-170 fps.

Philipp Oeser commented

2021-07-15 14:18:18 +02:00

Changed status from 'Needs User Info' to: 'Needs Developer To Reproduce'

Philipp Oeser commented

2021-07-15 14:18:18 +02:00

In #82259#1191567, @tintwotin wrote:

Blender Version
Broken: version: 2.92.0 Alpha, branch: master, commit date: 2020-10-28 23:40, hash: cac8a7cddb

This was happening before before 7b76a160a4 (and is still happening with the latest master).

I'm getting a max of 40 fps with an empty timeline and same thing with an animated color strip.

Thx getting back.
@iss: you seemsed to be having an idea about the issue here, does the answer help?

> In #82259#1191567, @tintwotin wrote: >> Blender Version >> Broken: version: 2.92.0 Alpha, branch: master, commit date: 2020-10-28 23:40, hash: cac8a7cddb > > This was happening before before 7b76a160a4 (and is still happening with the latest master). > > I'm getting a max of 40 fps with an empty timeline and same thing with an animated color strip. Thx getting back. @iss: you seemsed to be having an idea about the issue here, does the answer help?

tintwotin commented

2021-09-03 18:38:19 +02:00

Removed subscriber: @tintwotin

tintwotin commented

2021-09-03 18:38:33 +02:00

Added subscriber: @tintwotin

tintwotin commented

2021-10-26 08:55:04 +02:00

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

tintwotin closed this issue

2021-10-26 08:55:04 +02:00

tintwotin commented

2021-10-26 08:55:04 +02:00

As I do not have anymore time or motivation for a continued investment in the Blender project, I'm giving up on this report for now.

Philipp Oeser commented

2021-10-26 09:08:52 +02:00

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

Philipp Oeser reopened this issue

2021-10-26 09:08:52 +02:00

Philipp Oeser commented

2021-10-26 09:08:52 +02:00

Sorry to hear (thx again reporting). In my opinion we should not sweep this under the carpet, there is still a chance to get this fixed in the future and others might be affected by this issue as well.
Feel free to unsubscribe though.

Sorry to hear (thx again reporting). In my opinion we should not sweep this under the carpet, there is still a chance to get this fixed in the future and others might be affected by this issue as well. Feel free to unsubscribe though.

tintwotin commented

2021-10-26 11:27:38 +02:00

Removed subscriber: @tintwotin

Philipp Oeser removed the

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VSE: Empty sequence plays 100+ fps in 2.90 and only 20+ in 2.91 #82259