On Thu, Apr 20, 2017 at 07:31:47PM +0000, Christian Weisgerber wrote: > On 2017-04-19, Heiko <bd09c6fmxoq2...@intermezzo.net> wrote: > > > I'm using current on amd64 (Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz, > > 3411.91 MHz) > > > > I noticed that with clang it needs 109 minutes for "make build" and > > before with gcc 32 minutes. > > Not sure what you mean by "performance" in the subject. We're not > building anything with clang yet, apart from clang itself. We have > simply added clang. The rest of the build is identical. > > And yes, clang is a big C++ program and C++ code compiles s l o w l y. > > > Is this a normal behavior? > > The exact numbers are a bit odd, but generally speaking, yes, adding > clang has substantially increased the build time. I see about a > doubling on Xeon E3-12xx-based machines for make -j4 build.
I'm happy as long as building the complete base system takes less than a day. I'm more concerned with the compiler generating good code, to be honest. Cheers, Kusalananda
