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https://issues.apache.org/jira/browse/XERCESC-1452?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Boris Kolpackov updated XERCESC-1452:
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Affects Version/s: (was: 2.6.0)
3.0.1
Fix Version/s: 3.1.0
Assignee: Boris Kolpackov
MAP_SIZE is the number of buckets in the hash table used to store things like
entities, etc., as well as attributes. I also tend to think that 193 for
attribute map is a bit too much since in most cases we don't have more than a
few attributes. This implementation also doesn't not support rehashing so I
wonder why don't we use one of the HashMap templates. I will check into this.
> DOMNamedNodeMapImpl::item() 10x preformance improvement
> -------------------------------------------------------
>
> Key: XERCESC-1452
> URL: https://issues.apache.org/jira/browse/XERCESC-1452
> Project: Xerces-C++
> Issue Type: Improvement
> Components: DOM
> Affects Versions: 3.0.1
> Environment: All environments
> Reporter: Jeff Keasler
> Assignee: Boris Kolpackov
> Fix For: 3.1.0
>
>
> 10 second bug fix -- change MAP_SIZE constant in DOMNamedNodeMapImpl.hpp from
> 193 to 17.
> I use literally millions of DomNodes each having 2-10 attributes and
> DOMNamedNodeMapImpl::item() is horribly implemented. It makes sense to fix
> the problem by changing the definition of MAP_SIZE to 17. Even people with
> 50 attributes will get decent performance if you make this change, wheras the
> vast majority of people who only use 5-10 will see up to a 10x performance
> improvement.
> Thank you.
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