Alessio Soldano created CXF-5891:
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Summary: ReadHeadersInterceptor performances improvement
Key: CXF-5891
URL: https://issues.apache.org/jira/browse/CXF-5891
Project: CXF
Issue Type: Improvement
Components: JAX-WS Runtime
Reporter: Alessio Soldano
Attachments: headers-perf.diff
It has been noticed by running some benchmarks that CXF performances could
possibly be improved for dealing of SOAP messages with no SOAP headers. The
ReadHeadersInterceptor builds a DOM Document for each SOAP message; while
that's fine if there actually are headers in the message, it looks like a waste
of time and memory if the message has no header. The document has big memory
footprint, which ends up in high heap memory pressure when running our
benchmarks. The final result is performance penalty.
I've been reasoning on a solution for starting parsing the message with StAX
(envelope and header part only, as per the PartialXMLStreamReader already in
place), buffering the stream events and optionally generating the DOM doc if a
soap header is actually found.
The initial patch is attached, some local tests show that the
ReadHeadersInterceptor performance (processing time) is ~*16%* better for
messages with no headers and ~*3%* worse for messages with 2 not trivial
headers.
Ideally, we could switch this patched processing method by default and give the
user a mean for disabling it (prop in the message/exchange ?). Moreover, we
could automatically disable it whenever WS-* interceptors are installed in the
chain (as WS-Security, WS-Addressing, WS-RM, etc. all imply headers being added
to the messages).
In terms of memory allocation, the patched version is dramatically better for
messages with no headers.
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