XPath.evaluate performance slows down (absurdly) over multiple calls

Question

I am trying to use the javax.xml.xpath package to run XPath expressions on a document with multiple namespaces, and I\'m having goofy performance problems.

My test d

Answer 1

Try cloning the node (so you won't have unnecessary references from its ancestors)

Node singleNode = nodes.item(i).cloneNode(true);

If you remove children, you will lose references and only get half of the nodes you want to process.