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1.1 ! root 1: .\" Copyright (c) 1980 Regents of the University of California. ! 2: .\" All rights reserved. The Berkeley software License Agreement ! 3: .\" specifies the terms and conditions for redistribution. ! 4: .\" ! 5: .\" @(#)time.1 6.2 (Berkeley) 11/17/87 ! 6: .\" ! 7: .TH TIME 1 "November 17, 1987" ! 8: .UC 4 ! 9: .SH NAME ! 10: time \- time a command ! 11: .SH SYNOPSIS ! 12: .B time ! 13: [-l] command ! 14: .SH DESCRIPTION ! 15: The given command is executed; after it is complete, \fItime\fP ! 16: prints the elapsed time during the command, the time spent in the ! 17: system, and the time spent in execution of the command. Times are ! 18: reported in seconds. If the \fB-l\fP option is supplied, the ! 19: contents of the \fIrusage\fP structure are printed as well. ! 20: .PP ! 21: On a PDP-11, the execution time can depend on what kind of memory ! 22: the program happens to land in; the user time in MOS is often half ! 23: what it is in core. ! 24: .PP ! 25: The times are printed on the diagnostic output stream, ``stderr''. ! 26: .PP ! 27: \fITime\fP is a built-in command to \fIcsh\fP(1), with a much different ! 28: syntax. This command is available as ``/bin/time'' to \fIcsh\fP users. ! 29: .SH BUGS ! 30: Elapsed time is accurate to the second, while the CPU times are measured ! 31: to the 100th second. Thus the sum of the CPU times can be up to a second ! 32: larger than the elapsed time. ! 33: .SH "SEE ALSO" ! 34: include/sys/h/resource.h
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