New xz compression stats

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http://forums.fedoraforum.org – The release of Fedora 12 will in all likelihood use the new xz compression for the RPM's. Are there any stats to show what kind of benefit there is to using this compression? My friend google couldn't help. I'm not questioning the move - from what I can gather, the algorithm takes much more CPU & RAM during compression, but produces much smaller output. Decompression takes a bit more CPU. But for RPM's it seems obvious that compression is done once, whereas distribution is done many times. It's a sure fire winner. I'm just interested to see the real world stats of how it stacks up against previous compression algorithms. Cheers Duncan (HowTos)