Re: Defer node expansion

[Joseph Kesselman <ke...@us.ibm.com>]

On Wednesday, 11/20/2002 at 02:46 ZE2, Pavel Ausianik 
<Pa...@epam.com> wrote:
> Could somebody explain when the defer node expansion should be used in
> xerces 2?

1) When you don't intend to examine the entire document, this choice can 
save memory and parsing time.

2) When latency (time before you can access the first node) is more 
important than throughput (time before you can access the last node), this 
choice can make your program more responsive.

Hence, deferred node expansion tends to be particularly helpful when 
processing only part of a large document. But it may cost performance when 
processing all of a small document. That's why it's optional.


(Note the similarity to  Xalan's "incremental DTM" mode.)

______________________________________
Joe Kesselman  / IBM Research

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