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Fixed in 2020.3.X



Found in




Issue ID




Editor performance drops when a Game Object with a Custom Editor has its element expanded

Inspector Framework


Reproduction steps:
1. Open the attached project: ""
2. In the Project window go to Assets > MackySoft > MackySoft.SerializeReferenceExtensions > Example
3. Open "Example" Scene
4. In the Profiler window, set Target Selection to Editor and Record profiling information
5. Select the "Example" Game Object in the Hierarchy window
6. In the Inspector window under "Commands" expand "Element 0"
7. Observe the Profiler

Expected result: Expanding elements within the Inspector window should not reduce performance
Actual result: Performance drops after expanding the elements

Reproducible with: 2020.2.0b3, 2020.3.30f1
Not reproducible with: 2019.4.37f1, 2020.2.0b2, 2020.3.31f1, 2020.3.33f1, 2021.2.19f1, 2021.3.1f1, 2022.1.0b15, 2022.2.0a9

  1. Resolution Note (fix version 2020.3):

    Fixed in: 2020.3.31f1

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