Andrii created XERCESC-2211:
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Summary: Xerces 3.2.0 (and newer) perfomance issue
Key: XERCESC-2211
URL: https://issues.apache.org/jira/browse/XERCESC-2211
Project: Xerces-C++
Issue Type: Bug
Reporter: Andrii
We are using Xerces library to parse huge(about 10 000 lines) XML configuration
file while starting one of our core application.
After switching from 3.1.4 to 3.2.0 version we started observing perfomance
issues. Parsing now takes about 3-4 seconds (previously it took less then 1
second).
I've made an investigation and found that almost all time is consumbed by
"castToChildImpl" function inside "DOMCasts.hpp" source file.
I've also noticed that in this function ("castToChildImpl") in 3.2.0 version
"dynamic_cast" is used for type conversion. Previously (in 3.1.4) usual c-type
cast was used. I made additional measurements and found that most of time
consumed by "castToChildImpl" function is spent exactly on this line of code
with "dynamic_cast":
"_HasDOMChildImpl *pE = dynamic_cast<HasDOMChildImpl*>(p);_"
Can we deal somehow with this?
Thank you.
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