On Wed, Aug 8, 2012 at 9:09 AM, Miles Bader <mi...@gnu.org> wrote: > Mike Stump <mikest...@comcast.net> writes: >>> Constructors are allowed, but PODs are often passed more efficiently. >>> That property seemed particularly important for double_int. >> >> Show us the difference in timing. Show us the generated code. I >> can't imagine that it could ever matter. > > I'm also curious about that statement... PODs don't really seem to > offer much advantage with modern compilers, except in a few very > specific cases (of which this doesn't seem to be one), e.g. in unions.
They make a difference for the by-value passing ABI. double-ints can be passed in two registers on most platforms. Richard. > -miles > > -- > values of β will give rise to dom!
