Hadrian builds a lot more than make after changing just the RTS
Rebuilding GHC after just changing a file in the RTS is fast as it just builds the C file and then relinks. Hadrian compiles a lot more after modifying one of the C files in `rts` which takes at least 5 minutes with the `prof` flavour.
It should be investigated why Hadrian compiles so much more when it isn't necessary to do so much recompilation.
issue