Cost of creating org.w3c.dom.Node

I am trying to create an xml of cached data at run time. I need to know if this would increase the response time considerably ..?
Is there any documents which talk about the cost of creating nodes(e.g.within loops) ..?
public Node createnode(Document d, String node_name, int node_value) {
org.w3c.dom.Node temp_element_node, temp_text_node;
temp_element_node = d.createElement(node_name);
temp_text_node = d.createTextNode(node_name);
temp_text_node.setNodeValue(node_value + "");
temp_element_node.appendChild(temp_text_node);
return temp_element_node;
Has anybody implimented a pool of nodes(like pool of database connections). Any information is appreciated!

It would certainly depend somewhat on which parser you were using, but i can't imagine it would be any more costly than any other type of object.

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