# DodecahedronGeometry in InstancedMesh low FPS on Mac OS/Chrome

**URL:** <https://discourse.threejs.org/t/dodecahedrongeometry-in-instancedmesh-low-fps-on-mac-os-chrome/34876>\
**Category:** Questions\
**Tags:** instanced-mesh, geometry\
**Created:** [February 14, 2022, 10:05pm UTC](https://discourse.threejs.org/t/dodecahedrongeometry-in-instancedmesh-low-fps-on-mac-os-chrome/34876 "2022-02-14T22:05:29Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![TheDutchCoder](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/thedutchcoder/32/24288_2.png) [@TheDutchCoder](https://discourse.threejs.org/u/TheDutchCoder)\
**Post date:** [February 14, 2022, 10:05pm UTC](https://discourse.threejs.org/t/dodecahedrongeometry-in-instancedmesh-low-fps-on-mac-os-chrome/34876/1 "2022-02-14T22:05:29Z")

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Hi there,

I have an issue where any of the subclasses of PolyhedronGeometry tank my FPS when using in an InstancedMesh.

I opened a github issue, but my repo was not accepted as a source, so I created a fiddle to show the issue: [three.js ~ example ~ Mr.doob - JSFiddle - Code Playground](https://jsfiddle.net/uqk471eL/11/)

On my machine (2016 Mac Book Pro, Mac OS 12.1, Chrome latest) my FPS drop to ~5 and my GPU gets clamped (even though it doesn’t get hot). This _only_ seems to happen with these (sub)classes of geometry. Other geometries seem to work just fine.

Is anyone able to replicate the issues I’m seeing on their end?  
I’m at a total loss, because this suddenly popped up (wasn’t an issue a week ago), but I don’t think three.js nor Chrome have updated in the meantime, so I wonder what’s going on.

Devtools shows no issues whatsoever, so this seems to happen on a hardware-related level.

Also note that FireFox works just fine.

Cheers!

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**Author:** ![Chaser\_Code](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/chaser_code/32/20199_2.png) [@Chaser\_Code](https://discourse.threejs.org/u/Chaser_Code)\
**Post date:** [February 15, 2022, 5:35am UTC](https://discourse.threejs.org/t/dodecahedrongeometry-in-instancedmesh-low-fps-on-mac-os-chrome/34876/2 "2022-02-15T05:35:00Z")

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Hello! 60 FPS on PC 2013 year. 4gb video, 8gb ram. Problem in your videocard or browser.  
 ![image](https://canada1.discourse-cdn.com/flex035/uploads/threejs/original/3X/c/6/c6d5a51e4ae1661f51b1d63d7ac3c35dcee814bf.png)

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**Author:** ![TheDutchCoder](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/thedutchcoder/32/24288_2.png) [@TheDutchCoder](https://discourse.threejs.org/u/TheDutchCoder)\
**Post date:** [February 15, 2022, 2:31pm UTC](https://discourse.threejs.org/t/dodecahedrongeometry-in-instancedmesh-low-fps-on-mac-os-chrome/34876/3 "2022-02-15T14:31:05Z")

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Hi thanks for checking it out. Yeah I think this is certainly some hardware thing. The GPU getting clamped down must be a combo of Chrome + MacOs and my config. And in true Apple nature I probably have no control over it either.

Thanks again for confirming, I’ll stick to FireFox ☹

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**Author:** ![Kristofer\_Swarovski](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/kristofer_swarovski/32/24452_2.png) [@Kristofer\_Swarovski](https://discourse.threejs.org/u/Kristofer_Swarovski)\
**Post date:** [February 22, 2022, 3:49pm UTC](https://discourse.threejs.org/t/dodecahedrongeometry-in-instancedmesh-low-fps-on-mac-os-chrome/34876/4 "2022-02-22T15:49:06Z")

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Hello. I have a similar problem on the same computer. The problem is only in chrome browser. I tried to install older versions of the browser but the problem remains.  
Did you fail to solve the problem?

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<div class="post-metadata">

**Author:** ![Chaser\_Code](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/chaser_code/32/20199_2.png) [@Chaser\_Code](https://discourse.threejs.org/u/Chaser_Code)\
**Post date:** [February 22, 2022, 4:06pm UTC](https://discourse.threejs.org/t/dodecahedrongeometry-in-instancedmesh-low-fps-on-mac-os-chrome/34876/5 "2022-02-22T16:06:41Z")

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Hardware accelerator disabled maybe