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AW: Compressed Pristines (Call for Vote)

From: Markus Schaber <m.schaber_at_3s-software.com>
Date: Tue, 27 Mar 2012 15:29:02 +0000

Hello, Branko,

> Von: Branko Čibej [mailto:brane_at_xbc.nu] Im Auftrag von Branko Cibej
> >> As others have pointed out, the only cases where compression and
> >> packing may cause trouble is working copies with a lot of binary,
> >> compressed files (.jars, various image formats, etc.) That's a
> >> problem that needs solving regardless of the compression algorithm or
> >> pack format.
> > This can be handled with a not-compressed flag and storing the data as-
> > is.

> You're jumping a couple steps here, the first two obviously being, a),
> identify which file formats should not be compressed, and b) figure out
> how to detect such files reasonably reliably.

That's an easy one: When the compressed file (including gzip-headers etc.) is not smaller than the original file, store it uncompressed. This can be enhanced with some percentage or watermark value (e. G. we need at least a reduction of 42 bytes or 2%).

(When we use packing, then the difference of the container size with and without the file is to be compared.)

Best regards

Markus Schaber

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Received on 2012-03-27 17:29:57 CEST

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