Declined Support for Enhanced Deflate in ZIP


Staff member
May 14, 2008
> Enhanced Deflate was in PKZIP 2.04g, referred to "Deflate64 format" by
> by UNZIP

I don't foresee that happening, for several reasons:

1) It isn't supported in the compression library we're using.

2) It's considered proprietary by PKWare (and is not documented).

3) It only provides a trivial improvement in compression. I don't see any
other advantage to the format (and it has pretty much disappeared from the
archiving scene).