Extremely high Unity.app CPU usage

Unity Engine
1

I’m getting really high CPU usage in Unity as of 5.5.0p2 (not sure if it was happening in 5.5.0f3 but it definitely was not happening in 5.4.x). I have a new MacBook Pro that’s pretty well decked out running macOS Sierra, but the editor – even when not running my game – still ends up using between 200 and 500% CPU after a while. Most notably I notice this when I awaken my laptop from sleep in the morning, but I haven’t done enough sleuthing to know when it actually starts happening. I just notice that my fans are going nuts and Activity Monitor shows Unity as the culprit.

Not really sure how to monitor/diagnose the issue (a bug report seems unhelpful because I don’t really have much information to provide) other than to point it out and ask if anyone else has noticed anything similar.

2

You can use the profiler (it will profile the editor).

–Eric

3

OK right now the Unity editor is using 200% CPU, I profiled it (hit the “Profile Editor” button in the Profiler window) and the CPU time is almost non-existent. After about a minute of profiling, the CPU time was 29.69ms. Clearly that’s not right though, correct?

4

Hmm, that makes things more difficult. When not actively running stuff, Unity 5.5 uses about the same CPU as previous versions here (i.e. 1-2%), so all I can say is 200-500% definitely isn’t right, but you already knew that.

–Eric