time - Time the execution of a script

       This  command  will  call  the  Tcl  interpreter  count times to evaluate script (or once if count is not
       specified).  It will then return a string of the form

              503.2microsecondsperiteration

       which indicates the average amount of time required per iteration, in microseconds.  Time is measured  in
       elapsed time, not CPU time.

       Estimate how long it takes for a simple Tcl for loop to count to a thousand:

              time {
                  for {set i 0} {$i<1000} {incr i} {
                      # empty body
                  }
              }

       script, time

Tcl                                                                                                   time(3tcl)

       time - Time the execution of a script

clock(3tcl)

timescript ?count?
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