Any for improving the iOS linking stage of Kotlin/Native? For some reason this seems to be a very slow process - much slower than ObjC/Swift equivalent - is there a sound reason for this or it's just very unoptimised from the Kotlin/Native side?

I think the focus has been on features and correctness. Performance improvements were talked about in the kotlinconf keynote and will be on the way. I’m not sure how far out though.

compilation caching was implemented, so debug build shall be way faster, especially when using dynamic caches