Search Issue Tracker
Won't Fix
Votes
1
Found in
5.5.1f1
Issue ID
889690
Regression
No
Value changes in UnityEngine.UI.Image/Text causes huge CPU usage in LayoutRebuilder
Huge lag spikes are encountered from Canvas.SendWillRenderCanvases() when UnityEngine.UI.Image or UnityEngine.UI.Text are modified
This happens when:
"color" of UnityEngine.UI.Image is modified
"enabled" of UnityEngine.UI.Image is modified
"text" of UnityEngine.UI.Text is modified
It also seems to happen when "color" of UnityEngine.UI.Text is modified
Steps to reproduce:
1. Open attached project.
2. Open the profiler window and look at the "UI" and/or "CPU" and "Memory" tabs.
3. Open scene "LayoutRebuild_PleaseDontKThx.unity".
4. Press "Play".
5. Alt+Click on the "Expand" arrow next to "Canvas" gameobject.
6. Select the last gameobject in that hierarchy.
7. Click on the "Color" widget of the "Image" component of that gameobject to open the color selection window.
8. Change the color constantly by changing a slider or picking in the spectrum of the color selection window.
9. Observe the lag in the profiler window.
Expected result: Changed values should not cause that much CPU usage
Actual result: Constantly being changed values causes huge CPU usage
Reproduced in: 2017.1.0a4, 2017.1.0a1, 5.6.0f1, 5.6.0b9, 5.5.2f1, 5.5.1f1, , 5.4.4p4, 5.2.2p3
All about bugs
View bugs we have successfully reproduced, and vote for the bugs you want to see fixed most urgently.
Latest issues
- The tag adder functionality does not work if a space is entered instead of a name
- Errors thrown in the Console when configuring In-App Purchases package
- Longer Scaler Profile names go out of the"Scaler Profilers" section
- AI Navigation window UI elements overlap when the AI Navigation window is docked and resized
- Editor freezes after some time when using NavMeshQuery::Raycast
Add comment