String interning (WAS: SAX2/Java: Towards a final form)

[David Brownell]

David Megginson wrote:
> 
> If I'm writing a filter, where do the strings for the names I'm
> passing on come from?
> 
> Well, most of the time, they'll come from upstream in the filter
> chain, so they're already interned and I don't have to worry about
> it.

If an application wants to rely on "==" then "most of the time"
just isn't good enough.  The filter needs to know definitively.

If the concern is only memory efficiency, then I tend to agree
that there may well be more important things to worry about.
But maybe not; so the filter can benefit from knowing if the
data it gets is already interned.

- Dave

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