Constant freezes in an empty project


I have good machine, Lenovo Legion 5 Pro i9, RTX 4070, 32 RAM.
I decided to try Unity 6, and I’m constantly freezing. It happens with any action. I just turn a cube on and off – and it freezes.

The profiler shows that the Editor consumes 99% of the time at these moments. This is nonsense. How can I work with this?

I also had memory leaks on Unity 6.0 LTS. A 2GB project ended up consuming 30. I decided to upgrade to Unity 6.3. The memory leaks seemed to have disappeared, and now the project doesn’t grow above 4 GM RAM, but the freezing has become constant.

I simply enable TMPro Text in the UI and get incredible freezing. Everything is fine in the build, but it’s impossible to work with it?

What are my options? Is it possible to downgrade from Unity 6 to 2022-3?

At first, I thought it was a problem with the new interface. I turned off everything! Every window except the game. And the freezes remained, even though they weren’t present in the build.

Some might think the problem is with the outliner; after turning it off, the freezes persisted.

Finally, I reached the scene with the cube, which freezes when I turn it off and on.

I thought the problem was in the Graphics API. And only when I enabled DX11. The peaks seemed to be smaller, but I’m not sure.

Thanks for helping, maybe waiting for unity staff answers. I can send a DXDiag, project for tests and other.

I had the same issue with a lenovo and it was the disk resetting.

What i need to do with this. Unity 2020-1-2-3 working fine and all working fine, except unity.

I open WIndows Evens Log and dont find any warnings and errors with disk reset. I scan disk with benchmark and all ok.

then you need to pull out all the perf tools and find out what its doing, both OS and unity side. For me it was easy, unfortunately for me, at the same time it was the end of the laptop as the idiot who installed the disk at factory munged the screw so you couldnt get the disk out.

Switch to Edit Mode profiling and if helpful for more details, enable Deep Profile as well. Then expand that EditorLoop section to drill down to where it spends most of the time.

If the issue is caused by package code such as Search, Version Control, or AI Assistent and you don’t use it, you can simply remove those packages from Package Manager.

Though I only work in a small project currently, I did notice 6.3 sometimes shows me a progressbar for 1-2s where I wouldn’t expect it. There may be an actual issue because you aren’t the only one to report a nagging progress bar or freeze more often than usual. Be sure to use the latest release version (9f1 currently), and keep updating as they appear if you decide to stick to 6.3.

Possible yes, but with caution. Downgrading isn’t supported and can cause issues due to assets possibly being serialized in a newer format.

The road to downgrade:

  • backup the project entirely respectively make a copy
  • remove the Library/ and Obj/ folders from the copy to ensure a clean slate
  • open in the older editor and see how it goes

Currently, doing so may cause an error because some project settings asset version has been bumped. Can be fixed by manually editing the .asset yaml file if you know where to look (you’ll probably find that thread by searching for the error message).


All goes to the editor IMGUI this is a without deep profile.

But in Deep profile mode all editor runs in 10 fps, and very hard to identify a problem. But all peaks goes to GUI or Profiler


One peak with TMP_Text with JIT. But i think profiler lie me.

My editor version is 3.9f1.

other things to try:

  • disable gsync or test using unity in 2nd monitor
  • test another mouse or adjust polling rate if supported (previously many had issues with high polling mouses in editor)

i try it but thats not working for me. :frowning:

maybe downgrade to 2022-3 versions of the editor this is single good solution for my problem.

Okay i do some research work. And localize a problem. Problem in TMP_Text.OnEnable.

When i do SetActive, thats cause a huuuge freeze. I use a last version of package in UGUI 2.0 Unity 6.

I dont turn on/off text and use opacity only to hide it and it working. No freezes and lags

Before i use TextMeshPro separate package and dont have a problems with it. But in unity 6 i cant use it anymore

TextMeshPro cause a huge game freeze and huge editor peak.

This parsing take a while only first time. When i place transparent text with letters in my scene. All lags is gone, when this dummy text on scene.