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Fixed in 2021.2.X



Found in



Issue ID




UI Toolkit window performance regression when resizing/docking windows on Windows with Editor Font set to System Font/Verdana

UI Toolkit


Steps to reproduce:
1. Create/Open any Unity project
2. Make sure "System Font" Editor Font is selected in Preferences
3. Open Window -> UI Toolkit -> Samples
4. Resize/Dock the Samples window, observe performance

Expected result: Resizing/docking the Samples window is smooth with no visible performance issues
Actual result: Editor lags very noticeably while resizing/docking the Samples window

Reproduced with: 2021.2.0a17, 2021.2.0a14
Didn't reproduce on: 2021.2.0a13, 2021.1.8f1, 2020.3.9f1, 2019.4.27f1

Note: Only reproduced on Windows with System Font/Verdana, all fonts on macOS work as expected.

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