Hi Florian, Precompiled headers are supposed to live side-by-side with their source headers, according to: https://gcc.gnu.org/onlinedocs/gcc/Precompiled-Headers.html
So you can probably do something like `find /usr/include -name "*.gch"` to see if there are GCC precompiled headers available. (Not sure where you should be searching in Gentoo to catch all headers, but you should be able to figure it out) Cheers, - Kim On Wed, Aug 1, 2018 at 11:28 PM, Florian Berger via cfe-users <cfe-users@lists.llvm.org> wrote: > On 01.08.2018 16:29, Jonas Toth via cfe-users wrote: >> >> very interesting. My experience with normal compilation is, that clang >> is faster. > > Here's the data. It's from a single run each, so it's nowhere near a > statistically sound sample. > > Package GCC Clang Difference > > dev-lang/python-2.7.15 2:31,640s 3:36,891s +43% > app-arch/unzip-6.0_p21-r2 0:07,859s 0:10,094s +28% > media-libs/opus-1.2.1 0:34,218s 0:46,750s +37% > mail-mta/exim-4.91-r2 0:39,779s 0:54,672s +37% > www-servers/nginx-1.12.2-r1 0:43,378s 1:03,537s +46% > dev-db/postgresql-10.3 4:03,518s 6:14,859s +54% > media-gfx/inkscape-0.92.2 28:21,146s 34:52,015s +23% > > >> Could it be, that there are some precompiled headers or similar present >> on the system, that GCC utilizes? > > That is possible. Where and how would I check that? > > Cheers, > Florian > > > _______________________________________________ > cfe-users mailing list > cfe-users@lists.llvm.org > http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users _______________________________________________ cfe-users mailing list cfe-users@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users
