Question Editor very slow on M1 Macbook Pro

Hi all even with a brand new empty project it maxes out around 40ish fps. It seems the cpu is flying up for no good reason.

Any ideas? I have disabled all extra apps on the mac. It should not be this slow. Using the latest Unity version (release) on the latest version of Big Sur. VSYNC is also off.

 

Hi this is 2020.2.3f1

 

I installed version 2020.1.17f1 and it is over 2500 fps, it is a bug with 2020.2.3f1 for me, m1 macbook pro latest big sur. The rendering in the editor looked slightly different also - in the new version the transparency was more 'solid' - possible that something is being thrown off in that version? not using metal? (says it is)

 

yeah sure here you go.

This is a blank project, it works fine in 2020.1.17f1, the moment it comes into the latest - boom. down to almost 40ish fps.

 

unfortunately same result, gets locked to around 40ish fps on average, I will post up an image of the editor profiler mode tomorrow. as soon as I go back to that other version its absolutely normal and fine.

 

Here is the editor profile. 40ish fps, blank scene again. Latest version (release) - something is very wrong in this one I lose over 2000 fps with no changes apart from new version.

 

No problem here you go.

 

Hey thanks, so I added a few more here for you: https://imgur.com/a/8MyCNmr

It happens no matter what quality setting (vsync set to off) or project complexity, can be an empty project fresh from creating it or my own project imported in. Something seemed to have changed with how opacity was rendered in the main scene view with this version - I was not sure if I imagined it but then I noticed this problem. I have the scene open and game view open at the same time.

It helps slightly when the game view is maximised.

They are also on the same monitor (even tried disconnecting my external and using it just on the macbook pro but same thing.

Only thing that makes it return to normal is to use the older version and then i get thousands of fps no sweat.

edit: so I just tried to enable vsync in game view and it hits a solid 60 cap. As soon as I disable vsync, it goes back down to 40ish fps. So this version seems to hate it when vsync is off... in the game view? very odd issue here.

Edit 2: it seems to have started around version 2020.2.1f1 while 2020.1.17f1 is absolutely fine. This also happens in the 2021 beta, this is unusable if it carries on without a fix. This is also a fresh and brand new M1 Macbook Pro, updated to the latest big sur patch.

 

Well this is on 'desktop' so I cannot set multithreaded to anything else afaik. The whole editor is sluggish after I hit a 2020.2 update - Just tested on a windows machine and the same does not happen.

 

I was able to reproduce the issue with 2020.2.3 on a M1 Mac Book Pro 16 GB (BigSur 11.2.1) in a new universal render pipeline project. (Interaction Mode set to No Throttling)
With just either the scene view or the game view open the performance seems ok (80 - 120 fps) but as soon as both are open at the same time the performance drops to 35 - 45 fps.

Another thing I've observed is that in both cases the performance seems inconsistent. With just one view the frame rate would sit comfortably at around 120 fps for a while and then drop to around 80 for a while seemingly completely randomly but that might be a hardware throttling thing.

After some more testing I discovered that the issue only seems to occur when both the scene view and the game view are on the same monitor. If the game view is in a separate window on a separate monitor everything seems fine. Definitely looking like a V-Sync issue.

 

I have submitted a bug report.

 

I reproduce the issue too, the unity version is 2020.2.6. open scene view and game view in editor, only 30FPS. And it keeps 60 fps when I open the vsync option

 

On 2020.3.3f1 if I have Scene View and Game View visible I get around 60 fps and sometimes 30 fps but if I hide Scene View I get around 120 fps.

 

The Unity Customer QA Team successfully reproduced this issue.
https://issuetracker.unity3d.com/product/unity/issues/guid/1315581

 

To post an update to this, Macbook Pro 2016 (not M1)

2020.3.19f1 and 2020.3.20f1 causes my gameview to feel like its running at 1 FPS
Unity 2019 is totally fine.

Ive tried a lot of things, over an hours worth, and what made it 'better' for me, was Changing Interaction Mode, frame throttling to custom 33.

 

Still continues with 2020.3.20f1, also in editor mode scene is so lagging.

 

2020 M1 MacBook Air here on Unity 2020.3.25f1.

Had the same issue. Solution that worked for me was switching the Interaction Mode under Preferences --> General from "Default" to "Monitor Refresh Rate". Now I have stable 60 FPS on my 60Hz monitor.

 

I am also experiencing similar issues as the topic creator. I have a new 2021 MacBook Pro M1 (Pro) and I am seeing terrible lag.

When the game is playing in the editor with the scene view and game view visible, it is incredibly jerky and laggy. But as soon as I set play mode to full screen, it is a lot smoother. It's as if it struggles to render both scene and game view in parallel. Do we have a fix for this?

UPDATE:

I have just seen this ticket - https://issuetracker.unity3d.com/is...s-scene-view-and-game-view-open-in-the-editor

It states that framerate drops are expected when rendering two views. However, I did not experience such issues when running Unity on my 5 year old Windows Laptop with literally half the horsepower of my M1 Pro. So I do not believe it is as simple as it is being portrayed. Furthermore, my scene is virtually empty with three simple primitives moving around, and it lags like hell! This surely cannot be right..

 

Hiding the scene view and profiler when not in use will release the lock hold on your performance.
https://forum.unity.com/threads/tab-hide-and-unhide-helps-performance.1265177/

 

Can only agree and confirm the same issue.