in reply to
writing the data structure into a XML file (with high performance)
Can the database return XML? Even though I love XML::Twig I assume it won't be the fastest because it's beefy; however, I could be wrong. How about some Benchmarks?
It's not the fastest, but not because (just?) it's beefy. It's because it uses a relatively slow parser. One of the beefiest, XML::LibXML, is also one of the fastest.
XML::Bare is tiny bit faster than XML::LibXML, but it has so many limitations. XML::Fast is suppose to be a bit faster yet, but I expect it has the same limitations.
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Wait a second, ... is this poll a joke?
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