Hi, I am a long term Gentoo Linux user, which, as a source-based meta distribution, involves frequent (re-)compilation of a lot of packages from scratch.
Curious how Clang would perform against the system's gcc-7.3.0-r3 in terms of compilation speed, I installed clang-5.0.2 (latest stable on Gentoo) and compiled a handful of random packages: Python, unzip, libopus, exim, nginx, postresql. Setting was -O2, LTO was disabled. Surprisingly, Clang consistently took considerably longer to compile these packages than GCC, ranging from +28% (unzip) to +54% (postgresql), with a median increase of +40% in compile time. That contradicts the notion that Clang would be on par or quicker than GCC in terms of compilation time. Is that expected behaviour? May I have been missing some vital switch or setup? Any hints appreciated, and I'll gladly provide more information. Kind regards, Florian _______________________________________________ cfe-users mailing list cfe-users@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users
