Hi Rama,
I’ve tried to recreate your issue in both UE4.4.3 and UE4.5.1 with a basic Behavior Tree level with 100 skeletal meshes with 64 bones each. The 1st picture shows the 4.4.3 version and the 2nd picture shows the 4.5.1 version.
Both frame rates are virtually the same:
There have been no major changes in the way skeletal meshes are rendered that I am aware of in the past three builds. However, if the repro steps I’ve taken do not represent the same issue your describing, please let me know what I can do to better recreate the issue. Also, if you would like a copy of these projects to test on your machine, I’ll be happy to send them to you.
Thanks