[jira] [Closed] (XERCESC-2211) Xerces 3.2.0 (and newer) perfomance issue

     [ https://issues.apache.org/jira/browse/XERCESC-2211?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Scott Cantor closed XERCESC-2211.
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> 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
>            Priority: Major
>
> 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 (about 3 out of 4 seconds) 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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