Dragging a file to the root Assets directory of a project causes large allocations and a long hang which can lead to a OOM crash
Unity: Asset - Database
Fixed
2023.3.X
2023.2.X
2023.1.X
2022.3.X
2021.3.X
Improved DragAndDropForwarding to use significantly less memory and to be faster, particularly on very big projects. The file move now occurs close to instantly on the provided project.
Steps to reproduce:
1. Open the attached user's project "EmptyDirectoryProject.zip"
2. Locate "NewUnlitShader" under "Assets/prefabs/effects/bloodNew/shaders/NewUnlitShader.shader"
3. Drag the file to the Assets project root directory in the Project Windows
4. Observe the hang that will either persist or lead to a OOM crash
Expected results: The file instantly moves, no/limited allocation overhead
Actual results: Large allocations and long hangs occur or OOM crash occurs
Notes:
-Customer suspects it's due to DragAndDropForwarding::AddItemsFromTargetPath iterating over every file in the project when a file is dropped in the root directory
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