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Fixed in 1.3.0

Fixed in 1.2.13



Found in [Package]

1.1.0, 1.3.0-preview.6

Issue ID




Performance drop when using Control Track with Particle system if a clip is extended beyond the original duration

Package: Timeline


To reproduce:
1. Open attached project ("")
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 "HOLD" phase

Expected result: The FPS remains relatively close
Actual result: There is a significant FPS drop

Reproducible in: 2017.4.36f1, 2018.4.17f1, 2019.2.20f1, 2019.3.0f6, 2020.1.0a22

Reproducible in package versions: 1.1.0, 1.3.0-preview.6

Note: On a testing machine, the FPS drop resulted in a ~40% FPS loss (from ~2450 FPS while playing the initial clip, down to a ~1500 FPS while in the "HOLD" phase).

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