Shuriken particles - strange load CPU with ParticleSystem.Update

Question

I'm creating about 100 of shuriken particle systems (with max particles 10 each). Then I disable all of them (renderer.enabled = false), stopping them (.Stop() or .Pause()). Even setting emitterEnabled = false.

But even after this I loose all my CPU power on ParticleSystem.Update process. My FPS on iPad dropped from 40 to 7. ParticleSystem.Update() takes all my time.

What's wrong with this?

PS: Prewarm is off, particle systems are separate objects that are instantiated directly into the world (not attached to any other gameobjects).

Answer 1

Answer by sparrow · Oct 17, 2013 at 04:19 PM

I am having the exact same issues. Too bad none of the Unity devs are responding to this. I guess I will be rewriting the particles to a legacy system also...

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Answer 2

Answer by soulburner · Sep 27, 2012 at 10:01 AM

I couldn't solve this issue and re-wrote particles from shuriken to legacy. And everything worked fine! 0% CPU load.

My assumption is that shuriken particles (even if I stop them) always check all particle systems for the dead status and that's the reason it takes lots of CPU power. And I didn't find the way to shut it down.

Btw, CPU load when running on PC was veeery low. But on iPad ParticleSystem.Update() took a huge part of the load. Maybe the ParticleSystem.Update process is also poorly optimized for iOS?

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Answer 3

Answer by nsmith1024 · Feb 24, 2016 at 02:00 AM

I see the same issue, fps drops to 1 fps when i use many particles.

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Answer 4

Answer by GonTar_X · Dec 03, 2019 at 10:19 PM

same issues here. . . a lot of friends argue about this too

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Shuriken particles - strange load CPU with ParticleSystem.Update

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