How to reproduce:
1. Open the “IN-115811_AnimationPerformanceTest“ project
2.Open the “OutdoorsScene”
3. Open Window > Analysis > Profiler
4. Enter Play mode
5. Click on the “Exported From Modo” button
6. In the Profiler observe the “Time ms” for “Animator.SetupAvatarDataSet” when the button is clicked
7. Click on the “Exported From Blender” button
8. In the Profiler observe the “Time ms” for “Animator.SetupAvatarDataSet” when the button is clicked

Expected result: The performance is similar for step 6 and 8
Actual result: The performance is more than 10 times slower for step 8 than for step 6

Reproducible with: 2023.3.0b6, 6000.0.59f1, 6000.2.7f1, 6000.3.0b4, 6000.4.0a1
Could not test with: 2023.3.0b6 (Compilations errors due to packages)

Reproducible on: macOS 15.6.1 (M1 Max), Windows 11 (by user)
Not reproducible on: no other environments tested