: $ gcc-0 cmploop.c -o cmploop -pedantic -Wall -O0 -DEMPTY && time ./cmploop 0000000  real    0m0.000s user    0m0.000s sys     0m0.000s  $ gcc-0 cmploop.c -o cmploop -pedantic -Wall -O0 -DLOOP && time ./cmploop 0000000  real    0m0.000s user    0m0.000s sys     0m0.000s  $ gcc-0 cmploop.c -o cmploop -pedantic -Wall -O0 -DMEMCMP && time ./cmploop 0000000  real    0m0.000s user    0m0.000s sys     0m0.000s  