Did we forget something?

 gcc -o AvgWordLength AvgWordLength.c -std=c99 -O
[gabriel on android-1a7d5d7aa81a6719]:/Users/gabriel/courses/SeniorSeminar/13-14/performance
 time ./AvgWordLength
8.867128

real	0m0.023s
user	0m0.017s
sys	0m0.004s
[gabriel on android-1a7d5d7aa81a6719]:/Users/gabriel/courses/SeniorSeminar/13-14/performance
 gcc -o Sum Sum.c -std=c99 -O
[gabriel on android-1a7d5d7aa81a6719]:/Users/gabriel/courses/SeniorSeminar/13-14/performance
 time ./Sum
499999999500000000

real	0m0.006s
user	0m0.001s
sys	0m0.002s