DOM interfaces XML

[Sun]

Help will be appreciated very very much.

What I am doing is retrieving objects and collecting the properties of those objects I am forming an XML String.
The XML Structure looks somewhat like this

<Root>
<Child>
<GrandChild>
<GrandChild>
<GrandChild>
.
.
<Child>
<GrandChild>
<GrandChild>
<GrandChild>
.
.
<Child>
.
.
<Root>

Now the problem comes when there are 1000 <Child> Tags and each child has about 17-25 <GrandChild> Tags.

Forming an XML String of so many Tags Takes a lot of time and also eats Quite a lot of Memory.

This is What I am Doing :

for ( int i=0; i < 2000; i++ )
{
IXMLDOMDocumentPtr domDoc(__uuidof(MSXML:OMDocument));
domDoc.CreateNode(.., &domNode);
domDoc.appendChild(&domNode ,...)
domNode.QueryInterface(...., &domElement);
domElement.setAttribute(..)
domElement.setAttribute(..)
domElement.setAttribute(..)
domElement.setAttribute(..)
CreateGrandChildren(domDoc, domNode);

CComBSTR bstrXMLString;
domDoc.get_xml(&(bstrXMLString.m_str));
}

CreateGrandChildren(IXMLDOMDocumentPtr& domDoc, IXMLDOMNodePtr& domNode)
{
IXMLDOMNode domGChild;
IXMLDOMElement domGCElem;

for ( int i = 0; i < 20; i++)
{
domDoc.CreateNode(..., domGChild);
domNode.InsertBefore(domGChild, .., ..);
domGChild.QueryInterface(.., &domGCElem);
domGCElem.setAttribute(..);
domGCElem.setAttribute(..);
domGCElem.setAttribute(..);
domGCElem.setAttribute(..);
}
}


Can i speed up things by using some other method.
Please help me in this.

Thanx a lot.

Regards
Sun.