Performance Issue with RenderForwardOpaque.Render -> Clear

Hi all,

when I profile my App (for Android) on a phone (Samsung A5), the "RenderForwardOpaque.Render -> Clear" takes about 80% of the resources. Further, those "Clear" occurs in the other scenes too and takes some time (5 - 10 ms), even if the scene is almost empty (one static Camera; Clear flags: solid Color; one UI-Button).

This is acutally my first Unity-Project and I'm not sure whether the performance is good enough. Build on an older mobile device I can hold 30 FPS stable (a higher framerate is for this app not necessary).

According to the profiler information below, do you think this is good enough? What are normal/good CPU/GPU times on a phone (average device)?

(The profiled scene itself has zwo Cameras and contains a lot of UI-Elements/Sprites; only Mobile-Shaders and UI-Default Shader were used)


SetPass Calls :51
Draw Calls: 55
Total Batches: 55
Tris: 1.0k
Verts: 1.9k


What about this "RenderForwardOpaque.Render -> Clear" issue. Does anyone alread had to deal with this or can give me a hint how to approach this problem? After playing more than 15 min, the phone gets a little bit warm too. Could this be the reason for heating up the phone more than other apps do?

I would appreciate any help. Thanks for your time.