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| 1 | '\" |
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| 2 | '\" Copyright (c) 1993 The Regents of the University of California. |
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| 3 | '\" Copyright (c) 1994-1996 Sun Microsystems, Inc. |
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| 4 | '\" |
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| 5 | '\" See the file "license.terms" for information on usage and redistribution |
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| 6 | '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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| 7 | '\" |
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| 8 | '\" RCS: @(#) $Id: time.n,v 1.9 2007/12/13 15:22:33 dgp Exp $ |
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| 9 | '\" |
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| 10 | .so man.macros |
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| 11 | .TH time n "" Tcl "Tcl Built-In Commands" |
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| 12 | .BS |
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| 13 | '\" Note: do not modify the .SH NAME line immediately below! |
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| 14 | .SH NAME |
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| 15 | time \- Time the execution of a script |
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| 16 | .SH SYNOPSIS |
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| 17 | \fBtime \fIscript\fR ?\fIcount\fR? |
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| 18 | .BE |
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| 19 | |
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| 20 | .SH DESCRIPTION |
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| 21 | .PP |
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| 22 | This command will call the Tcl interpreter \fIcount\fR |
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| 23 | times to evaluate \fIscript\fR (or once if \fIcount\fR is not |
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| 24 | specified). It will then return a string of the form |
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| 25 | .CS |
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| 26 | \fB503 microseconds per iteration\fR |
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| 27 | .CE |
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| 28 | which indicates the average amount of time required per iteration, |
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| 29 | in microseconds. |
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| 30 | Time is measured in elapsed time, not CPU time. |
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| 31 | .SH EXAMPLE |
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| 32 | Estimate how long it takes for a simple Tcl \fBfor\fR loop to count to |
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| 33 | a thousand: |
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| 34 | .CS |
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| 35 | time { |
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| 36 | for {set i 0} {$i<1000} {incr i} { |
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| 37 | # empty body |
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| 38 | } |
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| 39 | } |
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| 40 | .CE |
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| 41 | |
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| 42 | .SH "SEE ALSO" |
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| 43 | clock(n) |
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| 44 | |
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| 45 | .SH KEYWORDS |
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| 46 | script, time |
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