so why /does/ compiling llvm on 12 3.5 GHz cores take an hour and a half?
@tindall probably really bad compilation unit fragmentation/bottlenecking and weird code patterns that the optimizer chokes on? idk
@tindall huh, no idea. Actually, ignore me; I'm thinking of llvm-in-rust builds, not standalone llvm.
@tindall that's ... really something. Last time I compiled it (on an 8 core/16 thread box, ~4ghz) it took about 16 minutes – including running some of the tests afterwards.
It sounds like it wasn't using all your cpu cores, what did you specify as the "-j" option when running make?
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