Foget types. Time to board

My favourite is this because it seems types can be instantiated lazily when properties are used on a interface. But the test cases obviously fully instantiate the types so it does not show

My first solution was this, but of course it could be more efficient

If you know some code will never go down some conditional branch then instantiations can be reduced by adding additional conditionals. This lowers it to 5013 instantiations

This was my first solution. With the given test cases it had 6524 instantiations