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Question by VivienS · Feb 27, 2012 at 09:50 AM · collisioncolliderperformancecolliders

Does disabling colliders increase performance?

Hey.

The title says it all:

Does it improve performance to disable collider components (they have an enable/disable flag in the inspector since some versions, like script components with update functions)? Does it stop all physics calculations? I wasn't able to find anything in the documentation.

Thanks.

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avatar image VivienS · Feb 27, 2012 at 02:18 PM 0
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Ok, tried it out myself in an empty scene with ~2300 small objects (210 triangles each) with $$anonymous$$eshColliders and the Fist Person Controller prefab.

Disabling the $$anonymous$$eshColliders didn't bring down the frame rate significantly, but in the Profiler, it brought the Physics.Simulate task down from 11.2% to 0.7%...

so definitely an impact.

Would be nice though if anyone new more about what disabling of colliders does actually do!

avatar image VivienS · Jan 22, 2014 at 09:45 PM 0
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Did some further research, and found this very nice performance comparison by DoktorAce (Thank you!): http://answers.unity3d.com/questions/209582/remove-collider-vs-putting-on-a-layer-that-ignores.html

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Answer by eaglemaster7 · Feb 27, 2012 at 11:19 AM

yes but a little bit i think, you can notice on profiler how much resource on physic is used..

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Answer by Dreamside · Feb 27, 2012 at 12:01 PM

I suggest that if those objects will not physically interact with other game objects, you should remove collider component. It will increase game performance.

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avatar image VivienS · Feb 27, 2012 at 01:25 PM 0
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It's a special case: I want to keep the connection to a prefab that contains the collider component. Removing components will destroy the link, disabling them wont.

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