iOS performance is bad. Android working fine. Help is needed guys!

Unity Engine
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1

Hello guys, it seems that i just can not get my game to work nice on iOS devices. It is working quite good on lower end Android Devices. I am using Unity, 5.3.2f1

I went through all graphics API, Metal, GLES 2.0 and 3.0 and i get hiccups from all of them but i get the best performance from 2.0

Also the acceleromater freq is set to Disabled, game is not using it, Iphone only SDK, Optimized Fastest and Smallest in xCode, tried in 3 different Unity versions and Xcode 7 beta 5, beta 3 , 7.2…

Still i get these weird hiccups, its like a small drop in framerates that i just cant explain. Game is vsynced, using Application TargetFramerate to 60, altough setting it to 30 does not solve the problem. Game still has hiccups.

I tried everything, read a lot of articles, scoured the internet for days and still no solution. Game also has hiccups on Ipad Air, and on any iPhone from 6 Plus to 5. Performance is same across them all, except for those hiccups.

I tried using Unlit shaders, Sprite shaders, Normal ones, deleting my whole backgrounds to reduce draw calls. I get only 10 of them per level, and my Verts and Tris dont go above 200 each on a whole level.

Nothing helped. But on a profiler i noticed something weird, every hiccup it appears that is caused by Graphics.PresentAndSync which for me makes no sense, how could vsync cause hiccups, also i tried without then, performance was even worse, hiccups become more regular.

Also i tried reducing physics timestep, didnt work.

Here are a couple of screenshots, please take a look at them, and help me fix this. I can not release my game without an iOS version. Its a basic 2D platformer game, nothing too fancy with graphics and effects and particles, so i dont know whats causing them.

Every input is appreciated! :slight_smile:

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2

Bump. Anyone? Now after some testing i also suspect Camera Render Culling, but i am not yet sure.

3

Could you show a screenshot the profiled timeline (as opposed to hierarchy) of one of those slow frames? Expand the frame across the screen so that as much as possible information is visible.

4

Oh, okey i think i have done it right. Again Graphics.PresentAndSync is taking up a lot of times.

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5

Bump and Update. After a week of trying to resolve the issue, many hours of head banging i have decided to skip the iOS release and just release Android for now.

It seems this is quite unfixable so far and after the release on Android i will try to reimport the whole project as a new project on OS X, part by part for control, its going to be a long and tiresome process but i hope i will resolve it that way in a couple of weeks so i can release for iOS too.

6

Bump. For anyone wondering it is fixed. As my last try i went and downloaded Unity 5.4 Beta version, and i built my game, installed it and it worked. That weird hiccup i had is gone and game is working like a charm now, the way it should. Even though it was 4 AM i still jumped all happy around my Apartment, now i can release for iOS too. Silly Unity, i knew it was them and not my 2 months old programming skills :slight_smile:

7

Hi Urosq,
which beta version did you used? I’m still facing this problem, using a simple test project with cubes and only a camera script movement.

Our game runs fine on iPad2 and Android devices, but not on iPad Air.

Thanks