CrowdManager.NavMeshAgentTransforms hogs a lot of CPU

Hi,
I optimized our use of the Unity Navigation component by simplifying the NavMesh. When I profile my game, PathFinding uses about 0.1% CPU, but CrowdManager.NavMeshAgentTransforms uses something between 10-20% on a very fast computer for about 50-60 NavMeshAgents.

What is this function and can I make it use less CPU?

Thanks.
Martin

I would also like to know this.