Print out the execution time of a specified terminal command, 10 times

time_command.sh

# Usage: 
# ./time_command.sh "sleep 2"
# (or a command you actually care about timing, in quotes)

COMMAND="$1"

for N in {1..10}
do
    printf "$N: "
    ( time `eval $COMMAND` ) 2>&1 | grep real | awk '{ printf $2 }'
    echo
done