I change one line of C# in a unit test, and ask VS to run the unit test. It then spends 30 seconds building. This kills TDD and many other ways of exploratory

I change one line of C# in a unit test, and ask VS to run the unit test. It then spends 30 seconds building. This kills TDD and many other ways of exploratory development. This is not the case in any Java or Python IDE.