The chart below shows z/OS V1.12 validating parser performance improvements over z/OS V1.11.The results were generated by measuring performance when parsing a set of XML documents of various sizes and complexities.
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Using a small input buffer size may require multiple buffers to hold a large XML document, requiring both additional application and parser processing.
This is also true for a small output buffer size where the parsed fields of a large XML document may require multiple buffers.
The user then has the opportunity to load an OSR without having to reset the z/OS XML parser.
Having the schema discovery feature on when validating small documents degrades peformance.
z/OS XML System Services supports several character encodings.
The more commonly used ones are UTF-8, UTF-16, IBM-1047, and IBM-037.The reported cpbp was determined by calculating the geometric mean of the per byte costs for all benchmark documents.Because of the unique design of z/OS XML System Services, comparisons with other parsers using the SAX or DOM APIs should be judged in light of their different designs.With those caveats in mind, the following chart gives an idea of the capabilities of the z/OS XML System Services parser.In the chart below, comparison is made with XML4C 5.7, the parser included in the latest version of XML Toolkit for z/OS.Fragment parsing mode is a new function added to z/OS XML System Services V1.12.