Using a mass loader would indeed be the fastest option by far.

If you have to stick with Perl though, you can certainly gain speed. Tie::File has to do a lot of bookkeeping to a) find all the ends of lines b) update the file per your wishes. Maybe File::ReadBackwards is what you need: it is written to handle precisely the case you have efficiently.

Makeshifts last the longest.

In reply to Re: Better way to work with large TSV files? by Aristotle
in thread Better way to work with large TSV files? by radiantmatrix

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