David Abrahams wrote:
on Sat Sep 26 2009, Christopher Schmidt <mr.chr.schmidt-AT-online.de> wrote:
I attached a test driver to this post. The testcase instantiates 25*25 distinct tuples (either vertical or horizontal ones) with 0 to 10 elements. Then optionally a type (meta-at) and/or object lookup (at) is done on each element. I used gcc 4.4.1 (TDM-1 mingw32) and ptime to measure performance. It is pretty interesting that the instantiation of the horizontal tuple type is just slightly slower.
FYI, gcc 4.5 is going to look dramatically different (better) than 4.4.x for many metaprogramming tasks, because they're switching from linear to O(1) lookup of template instantiations.
Amazing! Regards, -- Joel de Guzman http://www.boostpro.com http://spirit.sf.net http://www.facebook.com/djowel Meet me at BoostCon http://www.boostcon.com/home http://www.facebook.com/boostcon