Optimization flags

[Lantos István]

Thank You!

2016-07-08 15:20 GMT+02:00 Valentin V. Bartenev <vbart at 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
>
> _______________________________________________
> nginx mailing list
> nginx at nginx.org
> http://mailman.nginx.org/mailman/listinfo/nginx
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.nginx.org/pipermail/nginx/attachments/20160708/d34e8875/attachment.html>