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From Dave Fisher <>
Subject Re: Zip madness !
Date Sat, 01 Aug 2015 15:24:13 GMT
Zip file format came out of DOS ages in the early 1980s and the PKZip program.

Phil Katz is no longer with us, I heard he passed on in the 80s with uncashed royality checks
under his bed.

It is now what it is.


Sent from my iPhone

> On Aug 1, 2015, at 2:33 AM, jan i <> wrote:
> Hi
> Does anybody know why zip has a mad inefficient directory structure ?
> I try to understand the why, but fail.
> A zip file, contains 1 global directory with information about every single
> file (flat structure, no
> sub directories, but filenames may contain a "/"). That is logical and
> expected.
> BUT in front of every file, there are a local file header, with filename
> about 3/4 of the information
> from the global directory. This information seems pure redundant and
> unneeded.
> What am I missing here ? on one of my test docx, the local headers are
> about 10% of the filesize (looong filenames) which could be thrown away.
> Hope somebody can see what I failed to see.
> rgds
> jan i.

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