RLS uses an unusually high amount of disk space for the project I am working on. (19 GB)
All this in target/rls/debug/incremental/

For a project that's about a few thousand lines of code, it uses around 16GB of disk space. Now I am unsure of what generates this, I use RLS as part of visual studio code.
All the files are generated while I worked on my project today: (11 Feb 2018). Or they were at least modified today.

For reference this is the lines of code output for my project (not too big).

If you want to reproduce the issue, I can give you access to my repo, or we can work something out.