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#

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Copyright (c) 2005 Risto Laakso

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All rights reserved.

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Redistribution and use in source and binary forms, with or without

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modification, are permitted provided that the following conditions

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are met:

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1. Redistributions of source code must retain the above copyright

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notice, this list of conditions and the following disclaimer.

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2. Redistributions in binary form must reproduce the above copyright

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notice, this list of conditions and the following disclaimer in the

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documentation and/or other materials provided with the distribution.

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3. The name of the author may not be used to endorse or promote products

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derived from this software without specific prior written permission.

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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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#

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(inpackage :cluser)

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(defun timesampleform (form &optional &key (samples 10))

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(let (start end times)

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(dotimes (i samples)

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(setq start (getinternalrealtime))

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(funcall form)

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(setq end (getinternalrealtime))

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(push ( end start) times))

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(flet ((calcavg (list) (float (/ (apply #'+ list) (length list))))

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(sq (x) (* x x)))

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(let* ((avg (calcavg times))

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(sqtimes (mapcar #'sq times))

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(stddev (sqrt ( (calcavg sqtimes) (sq (calcavg times)))))

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)

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;; (format t "; times ~S, sqtimes ~S~%" times sqtimes)

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(format t "; ~D samples, avg ~5F sec, stddev ~5F sec~%"

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samples

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(/ avg internaltimeunitspersecond)

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(/ stddev internaltimeunitspersecond))))))

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