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From: Peter Dimov (pdimov_at_[hidden])
Date: 2002-08-10 13:01:20

From: "Peter Dimov" <pdimov_at_[hidden]>
> From: "Philippe A. Bouchard" <philippeb_at_[hidden]>
> > Hi,
> >
> > Here is the proof ptr<> is faster and requires a lot less memory
> > shared_ptr<>.
> >
> > The results speak from themselves:
> >
> >
> > I know I don't take care of exceptions, but even with that the
> > start doubling or quadrupling...
> Philippe, try using #define BOOST_DISABLE_THREADS to get a fair
> Looking at the times, I get the feeling that shared_ptr is using the
> safe path. Apologies if this is not the case.

Some more comments. Using <type_traits.h> prevents ptr.h from working on
anything that doesn't use the SGI STL.

The implementation is pretty clever. I _think_ that the whole shared_ptr
spec can be implemented using your idea... if I were a standard library
implementor writing a std::shared_ptr I'd definitely consider using the
memory block header to store the data. :-)

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