Spikes with Physics.Simulate() in empty scene?

Hi!,

I'm profiling my game this days and have come across something really weird. I'm seeing spikes (25-40%) in some frames because of Physics.Simulate(). After checking everything was ok (I just have some collider for buttons than do not change their Transformation matrix) I checked the profiler with an empty scene with just a camera and again the spikes appeared.

I have read some posts about this issue but no one seems to know what is happening. Could anyone bring some likght to this issue? For me it is really important.

P.D. I'm on android.

Thanks in advance.