How does the '3D Library' SDK example perform on-device?

The SDK comes with a pretty cool 3D demo under C_API/Examples/3D library:

playdate-3d-example

As you can see from the .gif, it hits a steady 50fps on the simulator. I'm curious how it runs on-device. Can someone with hardware try it and report back?

It gets about 15-16 fps on the device. Not great, but not too terrible...

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There's an optimised and expanded fork by @NaOH that hits a solid 20fps with texture mapping!

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