4.3BSD - /usr/man/cat1/time.0

TIME(1)                                                                TIME(1)


NAME
       time - time a command

SYNOPSIS
       time command

DESCRIPTION
       The  given  command  is executed; after it is complete, time prints the
       elapsed time during the command, the time spent in the system, and  the
       time spent in execution of the command.  Times are reported in seconds.

       On a PDP-11, the execution time can depend on what kind of  memory  the
       program  happens to land in; the user time in MOS is often half what it
       is in core.

       The times are printed on the diagnostic output stream.

       Time is built in to csh(1), using a different output format.

BUGS
       Elapsed time is accurate to the second, while the CPU  times  are  mea‐
       sured  to the 100th second.  Thus the sum of the CPU times can be up to
       a second larger than the elapsed time.

       Time is a built-in command to csh(1), with  a  much  different  syntax.
       This command is available as ‘‘/bin/time’’ to csh users.


4th Berkeley Distribution       April 29, 1985                         TIME(1)