I have not had a chance to run your code yet but this node should enlighten you.

cut vs split (suggestions), which builds on Efficient way to sum columns in a file

It is one of the first few posts that i did in the monastery and it has very good replies form our monks!

-SK

In reply to Re: fast way to split and sum an input file by sk
in thread fast way to split and sum an input file by egunnar

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