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This is awesome.

This profile was taken with me circling my mouse around the buttons. A bunch of GPU work being done, and then some animations being triggered any time I accidentally went _over_ a button. The red tags on some of them is attempts to animate box-shadow, which can't be composited (is more expensive).

Everything works smoothly at 20x CPU throttling but given a lot of work happens on the GPU that's not surprising. Frustrating we still can't throttle the GPU to properly emulate lower-end devices, but here we are. Given how cool this is, it doesn't look egregiously expensive to me.

For comparison, here's a profile of me scrolling around this Bluesky thread and hovering things. I've tried to select a roughly equal time range so it's a reasonable visual comparison. Sadly because Bluesky has deeper stacks you can't see the GPU line.

Is there a depthmap of the button somewhere? How does the lighting model work?