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From: Ted Dunning <ted.dunning@gmail.com>
Date: Tue, 1 Jan 2013 11:48:28 -0800
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Subject: Re: [math] [linear] immutability
To: Commons Developers List <dev@commons.apache.org>
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On Tue, Jan 1, 2013 at 11:17 AM, S=C3=A9bastien Brisard <
sebastien.brisard@m4x.org> wrote:

> > Please mention that when I first mentioned in-place operations, I didn'=
t
> have speed in mind, but really memory.
>


> I think we would not gain much speedwise, as Java has become very good at
> allocating objects (this would be true of large problems, where typically=
 a
> few big objects would be allocated at each iteration. The conclusion woul=
d
> probably be different with many small objects to be allocated at each
> iteration).
>

Allocation is not the problem.  The problem is memory bandwidth due to the
copies that are a side effect of the allocation.

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