https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85466
--- Comment #15 from Daniel Elliott <cpphackster at gmail dot com> --- Good catch johnathan on the return type of max. (PS also enjoyed your accu talk on youtube). I also have been messing around with the benchmark a bit and have come to the conclusion that the sign function and the max isn't really necesary. simple ternary operators seems to do a better job. However, gcc still seems to be slower in these cases compared to clang. Ive attached benchmarkv2 which on my ivy bridge 2013 macbook pro gets.... GCC: ifStandard 600741 ns 600594 ns 1056 ifNoConditional 191043 ns 191000 ns 3694 Clang: ifStandard 88777 ns 88726 ns 7439 ifNoConditional 89818 ns 89777 ns 7910 Interestingly for the gcc case, if I return float from the when_greater_than function (which is just doing x > y ? 1: 0; then it matches gcc ifStandard speed exactly but if I return a float then goes down to the ~191000 ns speed shown above. But still not as fast as both clang cases. Have to say this is a lot of fun and thanks everyone for looking at this!
