Re: Octave optimisation for 64 bit ??

[David Bateman]

Phil Preston wrote:

> Hi
>
> we are looking at moving from Matlab on Win2000 to Octave on a 64 bit
> Linux for some image analysis works.
>
> Is octave already optimised or 64 bit systems ?
>  

Partially ready in the 2.9.x series.. There are some 64-bit issues with 
load/save of file due to the file formats, and also there are a couple 
of function currently disabled for 64-bit issues

> Someone said Octave gives a 10-20% speed boost on 32 bit systems.  
> (but can you trust someone ?)
>  
Sometime faster, sometime slower. Matlab winning for unvectorized code 
due to its type interferencing JIT compiler, where it can be 
significantly faster.  For this reason in most generic code octave will 
be slower. The good news is that things are happening on that front and 
it won't stay that way forever.

> Is it possible/easy to reconfigure Octave to take advantage of 64 bit
> systems ?
>  
Its as easy as ./configure on a 2.9.3 install and then build for 64-bit 
once you've confirmed that a 64-bit system was correctly identified..

> Is it worth the effort ?
>  
How much data do you have?

> thanks in advance, now I'll go read the manual some more in case the
> answer is in there
>
>  
Seeing as this stuff is new, I doubt it...

D.


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David Bateman                                address@hidden
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