-bash-3.00$ g++ -o strlen -O3 strlen.cpp
-bash-3.00$ ./strlen
old_get_zts_length()
        Proof: 4093
        Timer: 95

get_zts_length()
        Proof: 4093
        Timer: 40

strlen()
        Proof: 4093
        Timer: 190

-bash-3.00$