http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55309
--- Comment #12 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2013-02-05 11:17:42 UTC --- (In reply to comment #9) > > And, for compile time, you want to be testing with --enable-checking=release > Thanks! > With --enable-checking=release gcc's compile time drops to 374 seconds. > That's much better, but still 50% slower than clang (built with asserts) Hmm, that means gcc is 35% slower (374 vs. 243). That is exactly the slowdown that I see in all my tests. (So switching to clang is like moving from a 4-core to a 6-core machine from a compile time perspective.)