How to avoid GUI.Repaint spikes

I am getting GUI.Repaint->Event.Internal_MakeMasterEventCurrent() spikes (60 ms) when profiling on an android device on every 40th frame approximately.
I am not using OnGUI() method call in any of my scripts. Is there any way to totally remove the GUI.Repaint spikes.

 

Allegedly it's not enough to disable the script containing th OnGUI call - you have to remove it. Perhaps that helps?

 

Now I have commented out all OnGUI methods. However It has not helped much. I am heavily using TextMesh with dynamic font. Could it be because of that ?

 

Is that a Deep profile?

 

Yes

 

I have similar issue while, general I don't use Unity GUI, my interface entirely in NGUI, why do I have a spike in 36ms from GUI.Repaint -> GUIUtility.EndGUI (). Is there any way to disable totally buggy and brake standard Unity GUI?

 

its (2018) and Still i face this problem

 

Hi Guys,

I don't have OnGUI() anywhere in my entire project but still get 384B GC Alloc. My Unity version is 2017.3.0f3, Please help me. The only thing I used are UI Text & UI Image, Please Help

Thanks & Regards,
Bhanu

 

I don't have onGUI and still see GUI.Repaint spikes.. I'm on 2019.1.8f, can someone explain how to reduce the cpu usage by GUI.Repaint?

 

Same here.

 

Same here, 2019.3.0.

 

Same here.

 

90ms at constant spikes for about 10sec - happens about every 2-10min even if the Editor is not focused, I can watch youtube videos in a browser not paying attention to unity being open and I will still get the lag.
What exactly is happening here and how to avoid it? It seems to be the scene view, inspector view and hierarchy view.
I'll make further test, closing all those editor tabs to see if the lag is still happening.

 

Did you solved it?

 

IMGUI is quite slow, so I still have some troubles getting a stable framerate when the inspector is open but the >10sec spikes were caused by my damaged graphics card.
I had to change the cooler because it was constantly overheating ... idk why it only happend when Unity was open and not when playing games.
Upgrading to 2020.1 also was a big speedup, the scene view is just way faster now, as well as opening scripts in the inspector - everything feels more responsive than back then. If you face the same issue, check your GPU.

PS: Later I had a "delegate leak" in a custom debug drawing system I wrote, which was calling CustomDrawGizmo() and CustomDrawHandles() on all monobehaviours in the scene which also caused extreme lags. Basically I was drawing all Gizmos and Handles for all Objects in the Scene 100+ times per Editor Update Tick - but making the same mistake as I did is quite unlikely.
Fun Fact: I wrote the system to increase the performance because putting an if() condition into the OnDrawGizmos() Method can kill the performance when you have lots and lots of objects with potential gizmos to draw.

 

Anyone found a solution for this nasty problem?

 

+1

 

the unity 2020 is bullsheet every time has opening has erorr for proxy collobrate or other package
asset store in package manager not work and again is bullsheet
old version is so better
. always has repaint all wtf ........................
i tired that unity version
unity 2018 is so better

 

In my case, Rewired was making a problem. I had OnGui turned on, it all works now.

 

Im getting this too on a really simple scene. If I click aroudn the ui and tunr things off and one randmly it suddenly goes away, but that is very annoying, any solution ?

 

2021 still the same problem

 

This is not a 100% fix but I was able to reduce the magnitude of the spikes, thus mitigating their impact during profiling. First, turn off any profiler modules you don't need (ie turn off GPU/memory if you are mainly concerned with cpu usage). Next, reduce the number of windows you have open in the editor. Each one will take time in the editor loop to render. So if you have a game view + scene view + inspector window with transform updating in real time + debug console, that gets to be a lot. Hope this helps.

 

Yes I wish they would do repainting of unity ui in a diferent thread, or optimise it or something. Seems ludicrous to me that an object with 10 scripts can slow game down over 50%. Also you mention profiler modules, what exactly do you mean? All I know of is the profiler itself.

 

Are you saying you have 10 scripts with 10 OnGui() statements?

Why not make a single OnGui() manager object with a single OnGui() statement.

 

In my case it seems related to Unity ads when i show a rewarded video the gui.repaint is taking 368 B alloc

 

I have the same issue with the GUIRepaint. If I disable the adverts scripts it goes away.

 

I don't have any OnGUI(); function in my project. once I added a rewarded ad to the project I start getting a big spike on the GUI.repaint gc alloc. I used the same rewarded ad script provided by unity. it seems like that is the problem.

 

Are you guys using Debug.Draw?

I just disabled some of my debug gizmo and the GUI related garbage is completely gone.

 

In Unity 2021.3, reducing the number of enabled OnGUI() scripts to 0 will still call GUI.Repaint() but the time spent is around 0.01ms now, so acceptable.