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min function very slow?

From: Daniel J Sebald
Subject: min function very slow?
Date: Sat, 29 Jan 2005 19:36:13 -0600
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.3) Gecko/20041020

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,


N_loop = 1000;
for i=1:N_loop
  j = i;
looptime = toc()
for i=1:N_loop
  j = max(i);
maxtime = toc() - looptime
for i=1:N_loop
  j = min(i);
mintime = toc() - maxtime

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