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Found in [Package]

1.4.0-pre.3 - Physics

Issue ID

ECSB-1732

Regression

No

Excessive CPU usage happens when a Mesh Collider is attached to imported .blend models

Package: Unity Physics

-

How to reproduce:
1. Open the attached “IN-105787” project
2. Open the “Test” Scene and and expand the foldout in the Hierarchy
3. Enable and expand the “New Sub Scene”
4. Disable GameObjects “Ship_FBXImport_NotLaggy_A” and “Ship_FBXImport_NotLaggy_B”
5. Enter Play mode
6. Open the Profiler window and start recording the Profiler information by clicking the red button
7. Observe the result

Expected result: The CPU Usage does not consistently exceed the target frame time
Actual result: The CPU Usage consistently exceeds the target frame time

Reproducible with: 1.2.1 (2022.3.64f1), 1.4.0-pre.3 (2022.3.64f1, 6000.0.53f1, 6000.1.11f1, 6000.2.0b9, 6000.3.0a1)

Reproduced on: Windows 11
Not reproduced on: No other environment tested

Notes:
- The issue does not occur when the “Ship_BlenderImport_Laggy_A” and “Ship_BlenderImport_Laggy_B” GameObjects are marked as Static
- The user reports that the memory size for the Blender Import is very large when viewed in the Entities Hierarchy Inspector View for the Physics Collider

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