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https://issues.apache.org/jira/browse/XERCESC-1821?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12615855#action_12615855
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David Bertoni commented on XERCESC-1821:
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I agree with Scott that (a) and (b) are non-issues, as long as we document that
setting the default value is not synchronized.
As for Scott's question regarding (c): There is no way now to change the
default value. Rather, after constructing a DOMDocumentImpl instance, you can
call DOMDocumentImpl::setMemoryAllocationBlockSize(). That means you need to
call it for every document you create, if you don't like the default block size.
I doubt that the performance improvement of initializing one member variable
from a constant rather than a static variable is even measurable given what
else goes on in the constructor.
> 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
> Priority: Minor
> Fix For: 3.0.0
>
>
> 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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