How to disable building documentation and JS?

[Mingun]

The building cycle is extremely long. People complain about the Rust compiler, but they haven't seen Scala.

First of all, tests/build-compiler builds documentation. For what it for me when I want to test new compiler on the testsuite? The second, the same script builds JS, which I also want to skip because I do not test JS and do not change any JS-specific code. sbt test in compiler directory also does that. In addition, in recent scala version, the JS build issues kilometer warnings for each use of Future

How to disable building this things locally?