Hello,
we're making a game for iOS. When testing on iPhone3 and 4, the performance is fine, but every other minute we get a very short but noticable stutter.
Normally I'd suspect that's the garbage collector, but the profiler shows nothing pointing in that direction - rather stable memory, no garbage collector peaks in the profiler. Instead, I got those candidates:
- Mesh.DrawVBO
- CullSceneObjects
- Device.Present
- Mesh.SubmitVBO
- And occasionally Physics.Simulate
- Sometimes but rather seldom one of our scripts
Here's a link to some [profiler example pictures][1] - note that I'm not on the frame so you can see the actual spike, but I markek the method so you can see which one causes the spike.
Assuming that it might have to do something with the level we had, I made a [simple level][2] with a static camera. The character you see rolls and jumps. There is a simple NGUI gui involved to control the character. Nothing else is happening - still, spikes.
Here are the logs from the iPhone Unity internal profiler:
- [Normal level internal profiler logs][3]
- [Simple level internal profiler logs][4]
I'll try to make an even more simple level, but I thought it couldn't hurt to ask now - maybe somebody has an idea.
We're using:
- Unity 4.5
- NGUI 2.7
- 2D Toolkit, newest version
So, in conclusion, we get a noticable stutter every other minute even in a rather simple level. We aren't creating new objects as far as I see and memory seems fine to me.
[1]: https://imgur.com/a/lk4ix
[2]: https://i.imgur.com/CQlfoqL.jpg
[3]: http://pastebin.com/Z6UZjmVt
[4]: http://pastebin.com/QgxrAgHb
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