Animator.Update issue

Hello,

I am rebuilding an old project in Unity4 because the original project could not be converted. I have rebuild the main scene to be exactly like it was before, same FBX, culling, lightmaps etc. but now when I run it, it runs at 15fps on average, compared to the 80fps that is was running before (unity 3.5). The profiller shows that Animator.Update is about 85% of the load on the CPU. I am relatively new to programming and unity, so I do not exactly know what operations Animator.Update is recording, but there are no Animations in the scene or project. The Retarget, FKS Statemachine, IK& Final Poseā€¦ all show as 0% and when clicking on Animator.Update it shows two Objects both unnamed (N/A), each using about 40% of the CPU. Does anyone know what is causing this or what I need to do to fix the issue?

Thank you in advance for any advise you can offer.

Hello,

I have found the issue. The FBX files that I have imported were automatically being imported with an Animator component attached even though there was no animations. Removing this fixed the drain on the CPU and increase the frame rate.