This can improve performance by 200%. By default , unity 4 has legacy animation type which adds animator component to all instances.
If you check profiler , you will see how IK , blend trees and other components are running on that and they eat a lot of memory.
I had a tree with legacy animation type , and I saw there was animator component to about 50 trees. That makes 50 animator components! I didn’t see any problem on PC , because unity 4 is really optimized , but on mobile there was a lag.
So always check that. You can also use Profiler and find other problems
