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I started migrating all my old programming blog posts from enshittified Medium to dev.to and revisiting them at the same time.

A lot of things changed since #Kotlin 1.1, for example starting with Kotlin 1.5 the compiler is optimizing for loops of any combination of functions creating an integer progression. Check out the very unreasonable example near the end of this revised post: dev.to/cbeyls/explo...

The overhead of companion objects is worse than it seems when you drop down to the arm assembly. When accessing non constants, having to access the insurance means doing an initialization check at each call site.

R8 unfortunately doesn't always do this as initialization can have side effects.