Re: Class Constants - pros and cons

Lew <>
Tue, 27 Jul 2010 21:25:44 -0400
Alan Gutierrez wrote:

The scenario under discussion is, I want to do something that will reach
the limits of system memory. Your solution is procure memory. My
solution is to use virtual memory.

Again, it seems to me that `MappedByteBuffer` and a bunch of little
facades to the contents of the `MappedByteBuffer` is a preferred
solution that respects memory usage. The design is as expandable,
easy-to-maintain and bug free as a great big array of objects, without
having to think much about memory management at all.

I like that idea.

I don't know where "parallel" arrays come into play in the problem

Did you read this thread? Like, say, yesterday, when Tom McGlynn wrote:

E.g., suppose I were running a simulation of galaxy mergers
of two 100-million-star galaxies. Stars differ only in position,
velocity and mass. Rather than creating 200 million Star objects
I might create a combination flyweight/singleton Star where each
method call includes an index that is used to find the mutable
state in a few external arrays.

Alan Gutierrez wrote:

described. I'm imagining that, if the records consist entirely of
numeric values, that you can treat them as fixed length records.


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