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List:       koffice
Subject:    Re: KSpread cells
From:       Waldo Bastian <bastian () kde ! org>
Date:       2000-05-22 18:08:37
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On Mon, 22 May 2000, Werner Trobin wrote:
> What about one (yes, really one per application -> singleton)
> Pool which handles all the shared objects (format, precision,...)
> and their creation/deletion?
>
> You'd need that Pool (singleton, like KoFilterManager) and a Reference
> Counting base class. Then you'd derive all the shared "data-classes"
> from this base class.
> Every method which changes the properties of the object queries if
> that changed object exists or creates a new object...
> I don't know about the performance and memory savings of this solution,
> but by changing some implementation details (e.g. don't query for
> existing objects with the same properties, but simply "copy on write")
> one can trade memory for speed and vice versa (wow - this sounds
> familiar :).

Hey, it looks like you already read my previous mail which I'm going to send 
you :-)

QString uses the same copy-on-write semantics btw. 

Cheers,
Waldo

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