about latest versions

[Tatsuro MATSUOKA]

Hello

John has already answered what I would like to say.

For usual windows users, I think that it is not popular that users themselves build software from
source.  However, there would be not a little number of users build software from source code to
obtain the highest performance.   For unix uses, the building software from source is more popular
than for windows users.  As John has mentioned, this is not a problem of octave.  If you would like to
get highest performance by self building octave, you should move to the help at octave.org and throw a
different topic there.  
 
However, the building octave of source is very time consuming event for those who do not familiar
to unixy software building method.  If you will not carry out matrix calculation of large size, the
self-build will give you small gain for your time and for the your efforts.
Generally, most users will get rather good gain when they use pre-build binaries. 

Regards

Tatsuro
   

--- "John W. Eaton" :wrote

> On 19-Apr-2009, MHELHEFNY wrote:
> 
> | As you mentioned that both  VC++/3.0.3/SSE2  and  MinGW/3.0.2/SSE2  on  your
> | computer
> | gave , the same performance of about 1350 MFLOPS , What astonishes  me is
> | that MinGw/3.0.2
> | on my computer gives a performance of  3600  MFLOPS  which is more than 2.5
> | times more than
> |  that you have mentioned  and which is also 5 times more than  that of
> | Matlab (ver 6.5) which on my machine gave 660 MFLOPS  i.e. 1/5 of
> | MinGw/3.0.2 .
> | It is also  astonishing that Tatsuro's computer gave even more performance
> | :-
> | mingw(gcc-4.3.2-dw2-TDM)  MFLOPS = 4830.2 .
> 
> If you build Octave to link with an optimized BLAS library, you should
> get good performance for basic linear algebra operations like matrix
> multiplication, at least on the system for which the BLAS library was
> designed.  But your optimized BLAS library that is tuned for one
> system may not work well on another, different type of system (with a
> different cache size, for example).
> 
> Since these performance problems you are seeing are not problems with
> Octave itself, perhaps you could move this discussion somewhere else?
> 
> | May ,I dare to ask you , tatsuro and others what is more important in a
> | mathematical software than performance?.
> 
> Getting a correct answer?
> 
> jwe
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> 


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