For many common use cases, you can improve your XML-processing performance by taking advantage of XML-VTD's document-centric processing model.
by Jimmy Zhang
January 9, 2008
he latest Java version of the Virtual Token Descriptor for XML (VTD-XML) can function as a slicer, an editor, and an incremental modifier to intelligently manipulate XML document content. This article will show you how to use it, introduce you to the concept of "document-centric" XML processing and discuss its implications for service-oriented architecture (SOA) and the future of enterprise IT.
Previous articles on DevX (see Related Resources) presented VTD-XML as a general-purpose, ultra high-performance XML parser well-suited for processing large XML documents using XPath. In parsing mode, VTD-XML derives its memory efficiency and high performance from non-extractive parsing. Internally, VTD-XML retains the XML document intact in memory and un-decoded, using offsets and lengths to describe tokens in the XML document. By resorting entirely to primitive data types (such as 64-bit integers), VTD-XML achieves unrivaled performance and memory efficiency by eliminating unnecessary object creation and garbage collection costs (which are largely responsible for the poor performance of DOM and SAX parsing).
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he latest Java version of the Virtual Token Descriptor for XML (VTD-XML) can function as a slicer, an editor, and an incremental modifier to intelligently manipulate XML document content. This article will show you how to use it, introduce you to the concept of "document-centric" XML processing and discuss its implications for service-oriented architecture (SOA) and the future of enterprise IT.
