XPath Performance Test (XPath-PT) is a performance test for XPath 1.0. The test aims at investigating the performance of an XML query processor with respect to XPath 1.0 in terms of time spent to execute a query assuming that the processor correctly implements the XPath language. Notice that the aim of XPath-PT is not testing functional completeness and correctness of an XML processor. To this end, you may take advantage of XPath Functional Test.