[Bug]: heavy room needs zooming perf investigation
### What happened?

Seems like, especially when zoomed in, we should be culling and there should be better performance on this room:
https://staging.tldraw.com/f/fViysJfdJYTLT0qJZW5DI?d=v-39.-41.1344.1204.59gmSFwBWfw2IubrYqTzo
But even when there's only a couple shapes in view there's a low FPS.

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