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"Here is a memory-friendly function that should be able to split a big file in individual queries without needing to open the whole file at once:" Yep, that'll do.
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"Competitors should take a page from Apple's playbook here and be open about stuff that will give you a competitive advantage and shut the hell up about everything else. Open is not always better." If only because: you get a hell of a launch day. (But also because: you'll never promise things you can't deliver).