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Re: [xml-dev] What is more expensive persisting DOM in Memory orcreating DOM

> What is more expensive in terms of performance for a Web application?

They both cost me about a $1.50.  

> maintaining DOM in memory for use in subsequent requests or 
> recreating the DOM every time a request comes in

Expensive can only be measured in terms of the value of each resource
in your particular context.  If you're a RAM manufacturer, then maybe
persistent storage is cheap.  

What are you optimizing for:  Speed or Resource Consumption?

You have to answer that before anyone can answer your question.