od -A n -t d -N 15000 /dev/urandom | sort > output.txt 2>>error.txt
real	0m0.0106s
user	0m0.0044s
sys		0m0.0056s

echo -e "hello\nfrom\nthe\nother\nside\n" | tr a-z A-Z > output.txt 2>> error.txt
real	0m0.0068s
user	0m0.002s
sys		0m0.0198s

od -A n -t d -N 15000 /dev/urandom | head -n 100 > output.txt 2>>error.txt
real	0m0.0072s
user	0m0.0024s
sys		0m0.0046s