> On Jun 5, 2020, at 7:57 PM, Magnus Ihse Bursie > <magnus.ihse.bur...@oracle.com> wrote: > > On 2020-06-05 13:59, Jim Laskey wrote: >> I know there was a discussion about this elsewhere but I would like to take >> the opportunity to correct this now >> >> make//autoconf/flags-cflags.m4:241 >> >> […] >> MacOSX has been paying a historic and significant performance penalty for no >> valid reason. > This might be a valid change, but it has nothing to do with C++14, and > changing it at the same time will increase risk for unrelated strange errors. > Please open a separate JBS issue for this requested change.
I was going to say much the same thing. I don’t want to add that to the C++14 mix. I don’t even know for sure that it’s a desirable change. I’ve worked on projects that got better (measured) performance from -Os than from other global alternatives. One would need to do a bunch of performance testing and might need to go more deeply into the options to really optimize things.
