Reproduction steps:
1. Open attached project "1215857_mesh" and scene "SampleScene"
2. Enter Play Mode and observe the Profiler
3. Exit Play Mode, open "Cube" in Prefab Mode and the Inspector in Debug Mode
4. Change Mesh Collider's "Cooking Options" from 30 to -1 (all Cooking Options will be selected and "Everything" will be marked)
5. Enter Play Mode and observe the Profiler

Expected result: Performance is the same as when all the options are selected but the "Everything" option is not marked
Actual result: Editor performance is worse ("Mesh.Bake Scaled Mesh PhysX CollisionData" can be seen in the Profiler)

Reproducible with: 2019.3.0a9, 2019.3.0f6, 2020.1.0a22
Could not test with: 2017.4.36f1, 2018.4.17f1, 2019.2.20f1, 2019.3.0a8 ("Use Fast Midphase" not implemented)

Workaround: Resetting the Mesh Collider component or setting Cooking Options to 30 in the Inspector's Debug Mode