http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47012
--- Comment #6 from js-gcc at webkeks dot org <js-gcc at webkeks dot org> 2010-12-19 19:19:33 UTC --- Well, I did not plan to get that included in 4.6. If you are interested in optimizing the lookup: The lookup could be greatly improved if we also change the ABI, which is currently the limitation as the current ABI does not allow for coherent inline caching etc. This needs changes in the compiler, therefore I did not do that - maintaining a runtime AND patchset for two compilers really is too much work for a single person ;). I'd love to work on that, will you visit FOSDEM next year? If so, we could meet up there and hack on that :). I'd really love to reduce the extremely huge speed difference between the GNU runtime and the Apple runtime. At the moment, dispatch is more than 5 times faster with GNU (at least that's what I measured some time ago on Leopard, I guess with Snow Leopard it might be even more).