DragonFly On-Line Manual Pages

TIME(1)                DragonFly General Commands Manual               TIME(1)

NAME
     time -- time command execution

SYNOPSIS
     time [-al] [-h | -p] [-o file] utility [argument ...]

DESCRIPTION
     The time utility executes and times the specified utility.  After the
     utility finishes, time writes to the standard error stream, (in seconds):
     the total time elapsed, the time used to execute the utility process and
     the time consumed by system overhead.

     The following options are available:

     -a      If the -o flag is used, append to the specified file rather than
             overwriting it.  Otherwise, this option has no effect.

     -h      Print times in a human friendly format.  Times are printed in
             minutes, hours, etc. as appropriate.

     -l      The contents of the rusage structure are printed as well.

     -o file
             Write the output to file instead of stderr.  If file exists and
             the -a flag is not specified, the file will be overwritten.

     -p      Makes time output POSIX.2 compliant (each time is printed on its
             own line).

     Some shells may provide a builtin time command which is similar or
     identical to this utility.  Consult the builtin(1) manual page.

     If time receives a SIGINFO (see the status argument for stty(1)) signal,
     the current time the given command is running will be written to the
     standard output.

ENVIRONMENT
     The PATH environment variable is used to locate the requested utility if
     the name contains no `/' characters.

EXIT STATUS
     If utility could be timed successfully, its exit status is returned.  If
     the utility was found but could not be run, the exit status is 126.  If
     no utility could be found at all, the exit status is 127.  If time
     encounters any other error, the exit status is between 1 and 125
     included.

DIAGNOSTICS
     If utility terminated abnormally, a warning message is output to stderr.

SEE ALSO
     builtin(1), csh(1), getrusage(2), wait(2)

STANDARDS
     The time utility is expected to conform to ISO/IEC 9945-2:1993
     (``POSIX'').

HISTORY
     A time utility appeared in Version 3 AT&T UNIX.

DragonFly 4.9                    July 16, 2017                   DragonFly 4.9
time(n)                      Tcl Built-In Commands                     time(n)

______________________________________________________________________________

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

              503.2 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(n)

KEYWORDS
       script, time

Tcl                                                                    time(n)