[cfe-users] Question casually profiling Clang vs GCC
Florian Berger via cfe-users
cfe-users at lists.llvm.org
Wed Aug 1 14:28:40 PDT 2018
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?
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