DBD::CSV would probably be a good place to start for handling this stuff in a sane fashion.
Re: memory usage, it'd be far easier to suggest a better approach if we knew how you were going to be manipulating the data.
For example, if you're just iterating through, then you can use the DBI functions to get an array of each row, etc. No hoggin mem there.
Ah yes, formatting...there's a handy pair of tags you can put into your posts: <code> and </code>
Works quite well, you don't have to worry about escaping HTML or any of that stuff inside code tags.
Trinary
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