Command:   time - report how long a command takes
Syntax:    time command
Flags:     (none)
Examples:  time a.out               # Report how long a.out takes
           time ls -l *.c           # Report how long ls takes

     The command is executed and the real time, user  time,  and  system
time (in hours, minutes, and seconds) are printed.  Shell scripts cannot
be timed.