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https://issues.apache.org/jira/browse/XERCESC-1821?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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george updated XERCESC-1821:
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Attachment: DOMDocumentImpl.hpp
DOMDocumentImpl.cpp
Here is the sample. Essentially, a singleton is implmented in getConfig
method, which intialize the three parameters discussed. This is a thread
safe implementation, and there is only one additional io hit per system
instance. I have tested the code in windows, AIX, HP-UX, LINUX.
I understand there are room to improve in terms of performance, please comment.
I will be glad to include it.
George Xu
> Configurable kInitialHeapAllocSize in xerces
> ---------------------------------------------
>
> Key: XERCESC-1821
> URL: https://issues.apache.org/jira/browse/XERCESC-1821
> Project: Xerces-C++
> Issue Type: Improvement
> Components: DOM
> Environment: All OS
> Reporter: george
> Assignee: David Bertoni
> Priority: Minor
> Fix For: 3.0.0
>
> Attachments: DOMDocumentImpl.cpp, DOMDocumentImpl.hpp
>
>
> The default DOM initial heap size is 16k in the latest release (earlier
> release was 64k). this number could be still too big or too small for some
> system.
> The idea is to make the following parameters configurable in the constructor
> via a singleton read function.
> static XMLSize_t kInitialHeapAllocSize = 0x4000;
> static XMLSize_t kMaxHeapAllocSize = 0x20000;
> static XMLSize_t kMaxSubAllocationSize = 0x1000; // Any request for more
> bytes
> Now the question is if you think this is a valuable suggestion? I have a
> working code and would like to share if you think it worth the effort.
> Cheers
> George
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