I agree with BrowserUk's reply: I cannot imagine that a regex would be faster (or, if at all, to any significant degree) than unpack in extracting what seem, from the description in the OP, to be fixed-width data fields.

I would like to add that the lack of example input and output in the OP makes it much harder (for me at least) to understand exactly what is required. Even a very simple example would have helped greatly.

In reply to Re: Splitting into variables columned data without delimiters with a regexp ? by AnomalousMonk
in thread Splitting into variables columned data without delimiters with a regexp ? by gerleu

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