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time command
time [command ]

Korn shell only. Execute command and print the total elapsed time, user time, and system time (in seconds). Same as the Unix command time (see Chapter 2 ), except that the built-in version can also time other built-in commands as well as all commands in a pipeline.

The second form applies to ksh93 ; with no command , the total user and system times for the shell, and all children are printed.

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