Cache Woodstox XMLInputFactory#33
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lassetyr
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Feb 27, 2026
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Profiling in OpenTripPlanner shows excess CPU usage/ memory allocation due to the repeated construction of
XMLInputFactoryobjects.The contract of
XMLInputFactorydoes not guarantee that concrete implementations are thread-safe.However some libraries like Woodstox provide thread-safe
XMLInputFactoryimplementations and encourage users to reuse instances across threads (see https://github.com/FasterXML/Woodstox4/blob/master/release-notes/USAGE).This PR updates the SIRI parser so that it detects the use of Woodstox
XMLInputFactoryand caches it.For all other implementations, the XMLInputFactory is re-created at every call, as before.