Compression of SVG(Z)s in git repositories

Martin Gräßlin mgraesslin at kde.org
Tue Sep 2 10:48:07 UTC 2014


On Tuesday 02 September 2014 12:27:11 Sebastian Kügler wrote:
> On Monday, September 01, 2014 12:59:04 Elias Probst wrote:
> > I've noticed, that (except of only a very few) nearly all SVG files are
> > committed as SVGZ to our git repositories.
> > 
> > This has IMHO several drawbacks:
> > - every change will be stored as a single atomic blob
> > - git's internal packfile compression and deduplication can't be used
> > - no diffs for changes done to SVGs can be viewed
> > - batch-editing of files via sed/awk/… is way more difficult
> > 
> > I'd like to suggest to implement a git hook which enforces SVG files
> > being pushed uncompressed.
> > The compression of SVG to SVGZ might happen when building release
> > tarballs.
> > 
> > What are your thoughts? Any reasons not to do this?
> 
> Compressed SVG files are way faster to read (it's faster to decompress the
> data than to read it from disk). Also, the on-disk footprint is lower.
> 
> Both of these affect the runtime performance of Plasma.

which is not an argument against storing them as SVG in the repository. There 
could be a pre-install task in CMake which compresses them.

I think Elias suggestion makes sense on the git repository level, we just need 
to first put in place the CMake bits to ensure the installed files are still 
svgz.

Cheers
Martin
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