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.
Use subroutines for code reuse
Master regular expressions
Write my GUIs with Perl
Abandon CGI in favor of some modern web framework
Put my code in modules
Create CPAN distributions
test and document my code as I write it
Write OOP with or without animal help
Finally switch to a modern Perl style
Create a killer application with Perl
Detoxify from Perl and PerlMonks
Choose another language because Perl is dead
Learn to program for mobile devices
Complete my secret world domination project
None, because the road to hell is paved with good intentions
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