Tcl8.5.16/Tk8.5.16 Documentation > TclCmd > time

Tcl/Tk Applications | Tcl Commands | Tk Commands | Tcl Library | Tk Library

NAME

time - Time the execution of a script

SYNOPSIS

time script ?count?

DESCRIPTION

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

EXAMPLE

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
    }
}

SEE ALSO

clock

KEYWORDS

script, time
Copyright © 1995-1997 Roger E. Critchlow Jr. Copyright © 1993 The Regents of the University of California. Copyright © 1994-1996 Sun Microsystems, Inc.