Motivation for storing data in both data and download folders

[joewiz]

Why does the build.xml file create zipped versions of each file, then zip both the originals and the zips into the .xar and keep both in the db? This seems to duplicate data. But perhaps there's a good reason?

[jensopetersen]

This is done simply to ease the load on the server. The once compressed files are indexed and the twice compressed files are stored separately to be downloaded. Of course, the "live" files could be zipped on the fly, but since they are not edited on the server (yet), there is no reason to do so.