The time command can be an excellent tool for analyzing the performance of a shell script, program or command. When you run time followed by the command that you wish to time. Three results are printed when the program or script finishes executing:
The actual length of time (real-world time spent on the program).
The total time spent in the program
The total time spent on CPU overhead.
This can be useful for large or slow running scripts or programs to get an idea of just how much work they are actually doing.
$ time ./webstrip.sh
real 8m8.658s
user 0m25.700s
sys 0m1.850s
