Lower framerate on iOS since Unity 5

Hi,

I upgraded to Unity 5, but when starting a new project and setting the Application.targetFrameRate to 60, the fps on an iOS build stays at 30fps.

It is fixed when I change the background to a solid color.

Here are some screenshots from my empty scene:

An empty scene created by Unity5


That same empty scene with a solid color:


However, this only seems to work in an empty project. In my new project, which has around 8 game objects, the fps stays around 24fps.

I'm going to rebuild my project in Unity 4 to see if I have the same issue there.

I'm using https://www.assetstore.unity3d.com/en/#!/content/14656 to visualize the fps. The iOS device is an iPad 3th generation.

 

Yeah, there are already a lot about this issue.
New dynamic skybox has several thousands polygons and quite heavy shader.
So due you have a weak device with high resolution - this scene is already fragment shader heavy.

 

Hi,

I recreated my game in Unity 4 and I get a full 60 fps on iOS.
However, whatever I try in Unity 5 (changing the background, skybox, ...), the framerate never goes past 30 fps.

Are you sure there isn't a bug somewhere in Unity 5 that limits the framerate?

This problem also exists on an iPad 4th generation. I'm gonna try it on some newer devices when I get my hands on one of them.

 

Please submit a bugreport with your sample project.
Thanks!

 

Hello crockysam,

is the problem you mentioned fixed ?

At the same period (March / April) I had the same issue, and I have been forced to reinstall Unity 4 to have my project working normally. I would like to know if I can update to Unity 5 now without this problem of frame rate.
Thanks.

 

Some projects seem to run in full 60fps now. One other project of mine still runs at a mere 18fps :-(

 

Update:
I created a new camera on the project with the problems, chose a solid background and now I have an FPS of 60.
So it's fixed!

 

I spoke too soon. Changing the camera angle F***ed it up again. 30 fps again :-(

 

Dear Unity developers, will you fixed this before discontinuing Unity 4.6 ??

 

Please share your bugreport numbers.
Thanks!

 

Just wanted to add that I've just managed to run my app on Unity 5 for the first time (5.2.1) and to my eye it's running slower that in 4.6.8. Will investigate with profiler when I get a chance.

 

I would not be surprised at all. im still on 4.6.8 as finishing of a major project, then plan was to do new projects in 5.2x etc but really the performance worries me..ios is usually very stable with android and other devices being slow.. Very intrested to see what you find out.. Thanks

 

I thought I ran into this issue even with Unity 5.5, but it turned out that I had one of my mesh renderers set to use the standard shader instead of the mobile shader. The standard shader isn't meant for mobile and will absolutely crush the framerate.

 

tại sao tôi đặt
Application.targetFrameRate = 60;
QualitySettings.vSyncCount = 0;
when i test in xcode fps 30 ~ 32. why why

 

Please submit a bugreport with repro project attached to it.
Thanks

 

Same issue happening here. I have around 5 active cameras in the scene. When I disable one of the cameras (that is rendering nothing) I get 20+ FPS. (2017.2)