We all love Scala, but the one aspect we have a hard time accepting are long compile times. It’s not uncommon for a project to experience compilation times of a handful of minutes, if not worse. On top of that, compilation times are unpredictable, depending on a combination of language features, external libraries, and type annotations. A single line change may increase compilation times ten fold. Don’t bow to the compiler and accept long compilation times. Rather, understand how the compiler w…