od -A n -t d -N 15000 /dev/urandom | sort > output.txt 2>>error.txt
1)
real	0m0.012s
user	0m0.005s
sys		0m0.006s
2)
real	0m0.010s
user	0m0.004s
sys		0m0.006s
3)
real	0m0.010s
user	0m0.005s
sys		0m0.005s
4)
real	0m0.011s
user	0m0.004s
sys		0m0.006s
5)
real	0m0.010s
user	0m0.004s
sys		0m0.005s
-------------------------------------------------------------------------------------
echo -e "hello\nfrom\nthe\nother\nside\n" | tr a-z A-Z > output.txt 2>> error.txt
1)
real	0m0.008s
user	0m0.001s
sys		0m0.006s
2)
real	0m0.008s
user	0m0.001s
sys		0m0.006s
3)
real	0m0.006s
user	0m0.004s
sys		0m0.002s
4)
real	0m0.006s
user	0m0.002s
sys		0m0.005s
5)
real	0m0.006s
user	0m0.002s
sys		0m0.004s
-------------------------------------------------------------------------------------
od -A n -t d -N 15000 /dev/urandom | head -n 100 > output.txt 2>>error.txt
1)
real	0m0.008s
user	0m0.004s
sys		0m0.004s
2)
real	0m0.006s
user	0m0.002s
sys		0m0.004s
3)
real	0m0.006s
user	0m0.001s
sys		0m0.005s
4)
real	0m0.007s
user	0m0.003s
sys		0m0.004s
5)
real	0m0.009s
user	0m0.002s
sys		0m0.006s