This character is QuickSilver and he’s the fastest of the X-Men. Mule 3.6 has no super powers, but when it comes to XPath, it’s the fastest ever! As you may remember, with the release of Mule 3.6.0 the XPath and XSLT was revamped. In this post, I’d like to not only continue elaborating on how great the improvement is, but also focus on a new aspect: Performance.
In spite of JSON’s reign as the king of API data format, XML still remains the exchange data format of choice for a number of systems. Any service exposing functionality through SOAP, and many application built years ago (or even nowadays) still depend on XML to share data – to such an extent that in April 2013 the W3C published a new spec for version 3.0 of the XPath, XSLT and XQuery standards.
The other day I helped a customer figure out a little XPath problem: they had an XML document and wanted to process it depending on an XPath expression. Here’s the Mule config that shows what we were trying to achieve:
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