LZMA [0] is the compression used in 7-Zip archives, which achieves a much higher compression ratio than bzip2, but requires more time to compress (but less to decompress).
Debian's dpkg now has support for LZMA compressed packages. Testing on the latest UK planet (I'm not going to download the real planet), I got the following results (all the default settings): Original: 650625406 bytes gzip: 74858343 bytes, 37.198s to compress, 33.005s to decompress. 88.5% saving. bzip2: 57581322 bytes, 7m25.169s to compress, 45.983s to decompress. 91.1% saving, 23.0% over gzip. lzma: 38175614 bytes, 21m39.595s to compress, 36.187s to decompress. 94.1% saving, 49.0% over gzip, 33.7% over bzip2. As you may be able to see (my formatting isn't the best), lzma is a lot slower to compress that bzip2, but it is comparable to gzip to decompress. I remember 7-Zip planets being provided in the past, what was the reason for removing them? [0] http://tukaani.org/lzma/ -- Bruce Cowan <[EMAIL PROTECTED]> _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
