This is the mail archive of the
gcc-patches@gcc.gnu.org
mailing list for the GCC project.
Re: Use conditional casting with symtab_node
On Fri, Oct 5, 2012 at 11:50 PM, Lawrence Crowl <crowl@googlers.com> wrote:
> If no one cares about these time reports, then I will gladly stop
> spending the effort to make them.
It's not that no-one cases, I think, but the mathematics don't have to
be so complicated. Just showing or saying there's no significant
compile time impact is quite enough.
As for the confidence level, it depends so much on what else your
machine is doing (other users, kernel, whatever) that statistics
become just that: statistics, those worse-than-damned-lies numbers :-)
FWIW: I usually do 3 runs on a set of pre-processed cc1-i files
(excluding very small files, but also including a few non-cc1 files
e.g. interpret.cc from libjava) with patched and unpatched compiler,
and declare victory if there's no difference greater than a few % on
any of the test files.
Ciao!
Steven