https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69311
--- Comment #2 from Matthias Klose <doko at gcc dot gnu.org> --- 4.9 and 6 build within under a second, I didn't even look at the memory usage. 5 was killed automatically on a VM with 8G RAM + 6G swap; killed the cross build manually when reaching 16GB.
