Spiky Performance Issue

Unity Engine
1

Hi Everyone,

I have a very simple scene setup.

  • 2 Quads with material - mobile alpha blended (this is used for my background and ground).
  • Spawning Obstacles using object pooling.

My obstacle has 2 collider and a rigidbody. Moving it using rigidbody2d.velocity.

and my background and ground is scrolling using SetTextureOffset.

my project quality settings is set to “fastest”(Vsync = dont sync).
and in my script on Start i am setting the Application.targetFrameret to 60. and Qualitysettings.vSyncCount = 0.

However, the game still lagging and when I try to profile it,
It seems that the game is unstable and vSync is still On.
CPU-
Vsync = 10 - 16ms
CPU Overview -
WaitForTargetFPS = 12 - 15ms
GPU-
Other = 24 - 35ms
GPU Overview -
Camera.Render = 0.7ms

Has anybody experience the same?

2

Check your graphics driver for forced vsync. And profiling itself takes a hit on performance, so the results are not 100% like when the game runs without it. And targetFramerate is a framelimiter, which can be confused with vsync.

3

Hi Valoo,
I’m profiling with my android device. how can I check if forced vsync? and can we disable it?
and also, what can you suggest for the setup when building games for android?

4

Ah, sorry, i don’t own an android device (yet), so i have no experience with those. But collision handling is somewhat costly in Unity, so i would expect a mobile device to be a little less performant. Also if you’re using OnCollisionStay, that may as well be the source of the hickups (it’s implemented via the slow SendMessage() internally). I would suggest to reverse your logic and move the player (one collider) instead of the obstacles (many colliders) and benchmark if it is faster.

5

Hi Valoo, Thanks for replying.
Hmm. What I did now was, I tried to recreate the project.
Scene setup:

  • add 2 cubes for background and ground.

  • add materials on the cubes

  • add scripts to make it scroll using setTextureoffset.

  • Project Quality settings set to fastest

  • Create empty gameobject(gamecontroller) then add script which sets the vsync count to 0 and targetframerate to 60.

  • build and tried it on Android (Samsung Galaxy S4).

  • I’m still experiencing spiky performance.

Any Ideas? :frowning:

6

Any other scripts? using GetComponent<>() every frame for example is expensive. Besides that, use the profiler to find slow functions.
Edit: I found this, maybe it helps you too: “Before you build your apk go to the Android player settings, Other Settings, untick ‘Auto Graphics API’ and only add OpenGLES2 do not use 3 or even add it, its performance is terrible” (http://forum.unity3d.com/threads/very-poor-performance-on-android-after-upgrading-to-unity-5.306572/page-11#post-2433520)

7

Hi ValooFx,
That seems to eliminate the performance issue. :slight_smile:
Thank you verymuch!