Mac Developer Library Developer


This manual page is for Mac OS X version 10.9

If you are running a different version of Mac OS X, view the documentation locally:

  • In Terminal, using the man(1) command

Reading manual pages

Manual pages are intended as a quick reference for people who already understand a technology.

  • To learn how the manual is organized or to learn about command syntax, read the manual page for manpages(5).

  • For more information about this technology, look for other documentation in the Apple Developer Library.

  • For general information about writing shell scripts, read Shell Scripting Primer.

TIME(1)                   BSD General Commands Manual                  TIME(1)

     time -- time command execution

     time [-lp] utility

     The time utility executes and times utility.  After the utility finishes, time writes the total time
     elapsed, the time consumed by system overhead, and the time used to execute utility to the standard
     error stream.  Times are reported in seconds.

     Available options:

     -l      The contents of the rusage structure are printed.

     -p      The output is formatted as specified by IEEE Std 1003.2-1992 (``POSIX.2'').

     The csh(1) has its own and syntactically different builtin version of time.  The utility described here
     is available as /usr/bin/time to csh users.

     The time utility shall exit with one of the following values:

     1-125   An error occurred in the time utility.

     126     The utility was found but could not be invoked.

     127     The utility could not be found.

     Otherwise, the exit status of time shall be that of utility.

     csh(1), getrusage(2)


     The time utility conforms to IEEE Std 1003.2-1992 (``POSIX.2'').

     The granularity of seconds on microprocessors is crude and can result in times being reported for CPU
     usage which are too large by a second.

BSD                              June 6, 1993                              BSD

Reporting Problems

The way to report a problem with this manual page depends on the type of problem:

Content errors
Report errors in the content of this documentation with the feedback links below.
Bug reports
Report bugs in the functionality of the described tool or API through Bug Reporter.
Formatting problems
Report formatting mistakes in the online version of these pages with the feedback links below.