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Won't Fix
Votes
1
Found in [Package]
preview.2 - 1.4.0
Issue ID
1232412
Regression
No
Performance drop while using Control Track with Particle system when a clip enters the looping section
To reproduce:
1. Open attached project ("case_1232412.zip")
2. From Hierarchy select "TimelineControl" Game Object
3. Press Play and in Timeline window select the Control Track
4. Observe the FPS before and after the Control Track enters a looping section
Expected result: The FPS remains relatively close
Actual result: There is a significant FPS drop
Reproducible in: 2017.4.39f1, 2018.4.20f1, 2019.3.8f1, 2020.1.0b4, 2020.2.0a5
Reproducible in package versions: 1.1.0, preview.2 - 1.4.0
Note: In the Profiler window it can be observed how Update.DirectorUpdate spikes significantly in the looped section
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Resolution Note:
Disable the 'control children' flag on the first control track. There were multiple control tracks trying to advance the same particle systems, which causes them to de-synchronize and re-simulate. In 2019.4, the control children flag was changed to be defaulted to off.