Re: Efficient Matrix?

[Adrian Knoth <adi@drcomp.erfurt.thur.de>]

Alvery Grazebrook <nospam@grazebrook.demon.co.uk> wrote:

>>> type MATRIX is array (POSITIVE range <>, POSITIVE range <>) of BOOLEAN;
>>> type POINTER_MATRIX is access all MATRIX;
>>> A : POINTER_MATRIX := new MATRIX(1..10000,1..5000);
>>
>>> ideas to optimize this.
>>   pragma Pack (MATRIX);

> As you are probably aware, your matrix will take up 5e7 bits, or just
> under 10 Mbytes of storage, assuming the compiler is efficient in the
> way it packs the data. 

I'm not sure whether the compiler packs it at all. It is heap-allocated
memory (not stack) and it is not a bounded array (the type MATRIX).

That is why I cancelled my posting you're referring to.


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