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From Kim van der Linde <>
Subject Re: [math] API changes for RC2
Date Tue, 28 Sep 2004 13:59:09 GMT

Kim van der Linde wrote:

> Mark R. Diggory wrote:
>> This is the sort of thing that defeats the purpose of having the 
>> RealMatrix package. Such computations could be used to abuse the 
>> contents of the internal data structure effectively breaking the 
>> original Matrix.
>> We need a more OO strategy for capturing the requirements of your 
>> example. I believe it should be Functional in nature (like Functors).
> The version I gave was the simple one, where there is a fast and simple 
> way around. In a earlier piece of the code, the diffMatrix is actually 
> generated outside a 3000 iteration loop and reused everytime. This 
> reduces the memory overhead, I rather do not create 3000 matrix objects 
> as most of them are eliminated quickly as worse than an previous one. I 
> have encountered that in some cases, the GC is not capable of removing 
> them sufficiently fast (it has the lowest thread priority) and that 
> slows down the processing as the memory stay filled with garbage.

I just through of a simple way to do the same without the getDataRef 
method, which is actually dead simple now that I got it. So, no 
objections from my side anymore.


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