It took me a few days to convert 578 swift files in my own.
Martijn Schoemaker

It probably toke us the same time to have the project to compile, however we weren’t happy with some of the Xcode migration choices as well as some of our own practices.

A big chunk of work has been done in Objective c, namely nullability modifiers, swift name function conversion, function to class properties.

All the PRs together did add 4219 lines where removing 6326.

There is also the possibility that we are slower or our codebase was in a worst state.