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Fixed in Unity 2017.3



Found in


Issue ID




[Shuriken] WaitForJobGroup causes huge FPS drop after upgrading from 5.6 to 2017.1




Priority: 2Necessary for shipping a final release


Severity: 2No workaround

How to reproduce:
1. Download attached project file
2. Play the "Particles" scene

Expected result: Particles system works fine without causing FPS drop
Actual result: Particles system WaitForJobGroup causes huge FPS drop after 2 seconds of play (check attached image "01.png")

Reproduced with: 2017.1.0b1, 2017.1.0b10, 2017.1.0f3, 2017.2.0b3
Not reproduced with: 5.5.2f1. 5.6.0b11, 5.6.2p2, 2017.1.0a1,

Regression since: 2017.1.0b1

Comments (7)

  1. 10bc539916481f2b36a7117f5187df76?d=mm


    Jan 03, 2018 11:38

    Ok, further to my last comment - it only stalls when using meshes of Planes. Switching to Quads removed the stall.

  2. 10bc539916481f2b36a7117f5187df76?d=mm


    Jan 02, 2018 18:23

    In 2017.3.0f3 there is a stall in PreLateUpdate.ParticleSystemBehindUpdateAll -> ParticleSystem.Update when a particle effect is played but only if the particle renderer is of type Mesh.

  3. 667eb28ea43c1f9c31faee06e5c2115f?d=mm


    Nov 12, 2017 15:09

    I am still having this issue in 2017.3.0b8 on Android.
    in the Profiler, it shows as PreLateUpdate.ParticleSystemBehinUpdateAll -> ParticleSystem.Update.

    It lags as soon as my particle system is moved.

  4. 495e55a1ab7af58b9c2dbec7b81135f1?d=mm


    Oct 23, 2017 15:42

    I experienced various Shuriken Particle System performance issues in 2017.1, which didn't case any performance issue in earlier builds.

    Reporting those issues don't seem to make a difference. I mean, I had spent quite some time to create those reports, but it doesn't seem it's worth the time for Unity Technologies look at them.

    My workaround was to remove most Particle System's from the game. It's just frustrating to have another Unity feature that I can't make use of, because the performance is unacceptable.

  5. A8f918e8f20d857aa559b785bd2cb7d3?d=mm


    Oct 12, 2017 14:45

    To add a bit more... I switched off the editor Metal support and the spike I saw/delay/drop was gone.

  6. A8f918e8f20d857aa559b785bd2cb7d3?d=mm


    Oct 12, 2017 14:18

    Have this issue as well on 2017.1.2f1
    Funnily enough it is only on my MacBook. My Win machine doesn't show this at all.

  7. 93e277251090a0e269da2189da8777a2?d=mm


    Oct 05, 2017 15:33

    2017.1.1p4 have a bug nothing is fixed

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