RE: Fwd: [Bug c++/14563] octave built under Cygwin very slow]

[Bill Denney]

On Tue, 9 Aug 2005, James R. Phillips wrote:

> Also, (speculation alert) preallocating arrays in your m-file coding 
> might avoid repetitive calls in octave to new/delete, which are 
> apparently a large part of the compiler problem.

I'm 99% sure that this helps in both octave and matlab.  It doesn't have 
to reallocate memory which becomes more difficult when the allocation is 
trying to keep memory from being fragmented and it has to search for a 
larger block of space free.

I've actually had code in matlab that would run out of memory unless I 
pre-allocated one particularly large array (it was using about 512M of 1G 
of my RAM).

Bill

--
"Instead of torturing the on-air talent, torture kittens. While not
eliminating pledge drives, this would significantly shorten their length.
'Okay, we have 10 callers on the line. It looks like Fluffy gets a little
breather.'"  -- NPR Fund-Raising Alternative (www.netfunny.com)