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Does iOS not have code splitting? I thought most of iOS app bloat comes from the multiscreen assets. I surprised compiled code takes up so much space.

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Do iOS apps still use bitmap graphics?

In many cases yes, but svg support has been available in xcode since ver. 12 and before that pdf had been available. As a consultant I haven't worked on a project yet where vector assets has been chosen over bitmap

But does Xcode convert PDF and SVG to various PNG assets?

https://bjango.com/articles/svgassetcatalogs/

It's my understanding, as a designer, that it was auto-generating 2x and 3x PNGs as from your vector assets, and that's what actually got bundled in the final app—and that PNG compression was not good compared to what I could get by going through ImageOptim.

I would be quite happy to be wrong about that. It would save me a lot of time.

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