TIME(1) BSD Reference Manual TIME(1)
time - time command execution
time [-lp] utility
time 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 re- ported in seconds. The options are as follows: -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 time utility exists as a built-in to most shells, although they may be syntactically different. The utility described here is available as /usr/bin/time. 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), sh(1), getrusage(2)
The time utility conforms to IEEE Std 1003.2-1992 ("POSIX.2").
A time command appeared in Version 3 AT&T UNIX.
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. MirOS BSD #10-current June 6, 1993 1
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