Unity Performance assistance (Lerp, Update, Rigibody, etc)

I am having issue with performance slowdowns and could use some inputs.

Scene setup:

  1. I have a empty gameobject acting as the parent of 40 - 50 objects which were all made from primitives. I move the objects as a group using vector3 lerp to move the parent object. My player object in the scene is controlled by the accelerometer. When the scene the accelerometer is jerky, and after I kill a few of the bad guys, the controllers get smoother. My draw calls are less than 40, and I only have 18k Tris, about 30k verts.

Anyone who understand what might be going on, please provide some insight.

Thanks.

Don’t you have unity pro to profile this ?