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File Name	File Size		Posted by	Date
clang-vs-gcc.png	53.3 KB	open | download	Lanti	07/08/2016	Read message

Thank You!

2016-07-08 15:20 GMT+02:00 Valentin V. Bartenev <vbart@nginx.com>:

> On Friday 08 July 2016 14:44:00 Lantos István wrote:
> > The default --with-cc-opt flags for Nginx are these:
> >
> > *--with-cc-opt='-g -O2 -fstack-protector-strong -Wformat
> > > -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2'*
> > >
> >
> > However I added more optimizations, which are against the standard:
> >
> > *--with-cc-opt='-g -Ofast -march=native -ffast-math
> > > -fstack-protector-strong -Wformat -Werror=format-security
> > > -Wp,-D_FORTIFY_SOURCE=2'*
> > >
> >
> > So far I don't experience any bug, but I do have a higher benchmark:
> > 380-450 req/s compared to the original 290-310 req/s with cached
> > Node/Express app on my laptop.
> >
> > Is it safe to use -O3 or -Ofast flags with Nginx?
>
> Usually it is safe. You can run tests: http://hg.nginx.org/nginx-tests/
>
> >
> > Is it possible to build Nginx with clang? If so, should I symlink it to
> gcc
> > (I use Docker, this way gcc executable is trashed) or is there a way to
> > define the compiler with a flag?
>
> --with-cc=
>
> wbr, Valentin V. Bartenev
>
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