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Re: ATLAS and octave
From: 
John W. Eaton 
Subject: 
Re: ATLAS and octave 
Date: 
Fri, 11 Feb 2000 02:26:29 0600 (CST) 
On 10Feb2000, chenutournier marc <address@hidden> wrote:
 R=0;x=rand(512,1)+j*rand(512,1);
 t=cputime;R=R+x*x';;cputimet

 I have lost some time!

 normal octave gives .3 sec
 Altas ocatve gives .4 sec

 Can you confirm this and do you have an idea why this happens?
Is this result repeatable? What is the average over 100 runs?
512 elements is quite small compared to the 1e6 elements in the
1000x1000 example. The overhead of setting up the calculation is much
more likely to be the dominant factor for small examples.
jwe

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 Re: ATLAS and octave, (continued)
 Re: ATLAS and octave, stevenj, 2000/02/05
 Re: ATLAS and octave, R Clint Whaley, 2000/02/05
 Re: ATLAS and octave, R Clint Whaley, 2000/02/05
 Re: ATLAS and octave, stevenj, 2000/02/05
 Re: ATLAS and octave, R Clint Whaley, 2000/02/09
 Re: ATLAS and octave, R Clint Whaley, 2000/02/09
 Re: ATLAS and octave, Steven G. Johnson, 2000/02/09
 Re: ATLAS and octave, chenutournier marc, 2000/02/10
 Re: ATLAS and octave,
John W. Eaton <=