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Fixed in 2019.3.X



Found in


Issue ID




Selecting a large SerializedObject asset pauses editor for 2 seconds every time, while whole object is written into a vector

Graphics - General


Reproduction steps:
1. Download project "" and open in Unity
2. Open Project window Assets folder
3. Click on CityLightsAmber00 prefab, CityLightsAmber00 mesh, CityLightsWhite00 prefab and CityLightsWhite00 mesh in succession

Expected result: Editor does not freeze.
Actual result: Editor freezes for a second.

Reproduced on: 5.5.5p2; 5.6.4p3; 2017.1.2p3; 2017.2.0p3; 2017.3.0b11; 2018.1.0a6

  1. Resolution Note (fix version 2019.3):

    This issue should be much improved by the transition over to the new YAML library in 2019.3

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