On Wed, Feb 25, 2015 at 06:17:33PM -0300, Alexandre Oliva wrote:
> My measurements, for a not particularly unusual testcase, showed an
> overall reduction of 63% in compile time, as indicated yesterday. Now,
> who should bear the burden of collecting evidence to back up the claims
> against the change? Are those concerns enough to hold it up?
Can you e.g. run dwlocstat on some larger C++ binaries built without and
with your patch? I believe dwlocstat is supposed to count only the
instructions where the variables or parameters are in scope, so should be
exactly what we care about here.
E.g. cc1plus and libstdc++.so.6 might be good candidates from gcc itself,
perhaps firefox or similar as something even larger.
Jakub
