SAX2: Namespace proposal

David Megginson david at
Mon Dec 20 21:30:15 GMT 1999

Joe Lapp <jlapp at> writes:

> Using Java String interning, how do you guys guarantee performance
> in any of the DOM Element get*() methods that take Strings?  Do you
> require that the app intern the string before passing it in?  Do you
> try to make the methods smart so that if they're interned, you get
> performance, and if they aren't, you get a bit more of a penalty
> (for having done the intern check first)?  Do you make them dumb so
> that if you forgot to intern, you don't get anything?  Or would one
> always intern these externally provided Strings within the method?

With the DOM, I think, the biggest issue is not performance but memory
usage -- you do not want 500 separate "div2" strings floating around
in the same tree.  Interning is much more obviously essential for a
tree API than it is for a streaming API.

All the best,


David Megginson                 david at

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