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Fixed in 2017.4.0



Found in


Issue ID




[iOS] [Unity 2017] Performance drop spikes in Render.Mesh using Multithreaded Rendering



Reproduction steps:
1. Open the attached project.
2. Make sure Multithreaded Rendering is toggled in the Player Settings > Other.
3. Build and run to iOS and connect the Editor Profiler.
4. Inspect the CPU performance spikes in the Profiler.

Actual behavior (Screenshots attached):
- 10% - 70% CPU usage spikes in Render.Mesh.

Reproduced with:
- 2017.1.3p3, 2017.2.2p3, 2017.4.1f1

Not reproducible with:
- 2018.1.0f1 (Last screenshot)
- Android

Tested with:
- iPhone 6S+ iOS 10.3.2 (Should be reproducible on any device)

Similar cases:
- case 998779, case 970038, case 912717

Comments (2)

  1. rongames

    Sep 01, 2018 08:43

    this issue is also in 2017.4.10f1

  2. Raymond-Leung

    Jul 25, 2018 04:26

    We have the same issue using 2018.2.0f2

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