From maintainers-request at octave dot org Sat Jan 29 19:42:08 2005
Subject: Re: min function very slow?
From: "Dmitri A. Sergatskov" <dmitri at unm dot edu>
To: Daniel J Sebald <daniel dot sebald at ieee dot org>
CC: maintainers at octave dot org
Date: Sat, 29 Jan 2005 18:43:16 -0700



Daniel J Sebald wrote:
> My eyes are deceiving me.  I came across a slow loop and to my surprise 
> traced it to the min function.  But I'm wondering how this can be 
> because I looked through the source code and the min/max commands inside 
> minmax.cc and dNDArray.cc look identical except obviously for the change 
> in sign when testing order.  I have a fairly recent version of 2.1.64.
> 
> I put together a little test script.  Someone please try the attached 
> script.  My result is
> 
> octave:1> minmaxtime
> looptime = 0.044205
> maxtime = 0.081752
> mintime = 7.5832
> 
> Thank you,
> 
> Dan
> 

octave:1> minmaxtime
looptime = 0.035128
maxtime = 0.065962
mintime = 0.30040

Regards,

Dmitri

p.s. 2.1.64 + octave-forge-2004.11.16 / athlonMP 2000 MHz