RE: String interning (WAS: SAX2/Java: Towards a final form)
David Brownell wrote, > Miles Sabin wrote, > > Except that String.intern() isn't the _only_ way of > > making foo.equals(bar) iff foo == bar (in particular > > contexts, as opposed to across the whole JVM). > > It's the only way to ensure it's so if foo is a string > literal, as is rather common usage. I don't follow. You're surely not suggesting that foo == "literal".intern() is faster than, foo.equals("literal") are you? I assume not, but then I don't really see your point. It'd be easy enough to pre-populate an app-intern map with all the literals you were interested in. Granted, getting any benefits from this in a ContentHandler (as opposed to in a parser implementation) would mean we'd need something akin to Lars StringInterner interface to do the pre-populating. Anyhow, maybe the waters are getting a bit muddied. I'm assuming that all parsers will do interning of one sort or another internally. The issue for me is how much of that gets exposed via the SAX API. I don't want java-interning exposed, because that means my parser has no option but to use String.intern(). OTOH, _if_ the consensus is that some sort of interning must be exposed for the convenience of ContentHandler implementors then I'll go along with it, just so long as it's specified in such a way that it can be implemented in a completely thread-local way. But I'd much prefer it if the SAX API didn't expose any interning behaviour at all. I think we agree on that? Cheers, Miles -- Miles Sabin Cromwell Media Internet Systems Architect 5/6 Glenthorne Mews +44 (0)20 8817 4030 London, W6 0LJ, England msabin@c... http://www.cromwellmedia.com/ xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ or CD-ROM/ISBN 981-02-3594-1 Please note: New list subscriptions now closed in preparation for transfer to OASIS.
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