sbt Reference Manual — Understanding Incremental Recompilation

Understanding Incremental Recompilation Compiling Scala code with scalac is slow, but sbt often makes it faster. By understanding how, you can even understand how to make compilation even faster. Modifying source files with many dependencies might require recompiling only those source files (which might take 5 seconds for instance) instead of all the dependencies (which might take 2 minutes for in