Why is CMake so fast?

[Therem Harth]

Something I noticed when compiling ToME 2.3.5 vs. 2.3.9-ah: 2.3.5 (which uses a handwritten(?) makefile, as opposed to CMake) takes several minutes longer to compile.

Does CMake automatically invoke parallel jobs, or something like that?

[AnonymousHero]

CMake doesn't build in parallel automatically, but you can get to do that using, e.g.

make -j5

for compiling on 4 cores. Another option is to set the MAKEFLAGS environment variable to "-j5" (sans quotes).

I'm not sure if the "legacy" makefiles in ToME <= 2.3.5 support this properly in any way.