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Currently there is a problem with large XML documents. It takes long time to parse it and consumes a lot of memory. http://www.netbeans.org/issues/show_bug.cgi?id=22152 http://www.netbeans.org/issues/show_bug.cgi?id=22789 Try to improve it. Probably the only solution is with MDR and MOF-based XML metamodel. http://xml.netbeans.org/plans/model/
It is Tree API for XML (TAX) issue. It was never optimalized. Current concerns about: org.netbeans.tax.TreeChild.getOwnerDocument() org.netbeans.tax.<any-TreeObject-extend>.merge(...)
Tip: "intern" most of TAX Strings. [Element name, attribute name, namespace URI, declaration name, ...]
Some lost performance issue.