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    @sixlettervariables - possible more that the CPU has branch prediction while a function pointer call involves clearing stack/register. You wouldn't necessarily see this from the assem
    – Martin Beckett
    Commented Jul 25, 2012 at 14:38
  • 1
    depending on funcA and funcBs complexities, they could have been inlined. I agree with @sixlettervariables that checking the assembly is a good idea. It's easy to do, and if nothing else, at least you'll rule out some possible explanations.
    – Sander De Dycker
    Commented Jul 25, 2012 at 14:49
  • You can avoid full specialization when you use a templated struct to wrap the specific function. Then you only need to specialize the struct and the cat class needs to be specified only once.
    – tokage
    Commented Jul 25, 2012 at 14:56
  • What processor is this? Also, can you provide a complete SSCCE so I can run this myself?
    – Mysticial
    Commented Jul 25, 2012 at 15:07
  • @tokage wait that is interesting, where can I read about this or how does this work?
    – Palace Chan
    Commented Jul 25, 2012 at 22:09