If the sample is real and representative, then it looks like you have lots of similarities between two lines, akin to image data.

I'd try:

You can skip step 3 and try direct zipping tho after step 2, because Huffman is part of zip IIRC.

NB: feeding binary data into zip might be contra productive. Better a "readable" text where the patterns are visible.

Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery

In reply to Re: How to efficently pack a string of 63 characters by LanX
in thread How to efficently pack a string of 63 characters by baxy77bax

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