Toshio Kuratomi (a.badger(a)gmail.com) said:
On 09/23/2009 10:05 PM, Bill Nottingham wrote:
> Jonathan Dieter (jdieter(a)gmail.com) said:
>> The second one has to do with the fact that when rebuilding the rpms, we
>> have to recompress the data, and xz compression is over 10x slower than
>> gzip.
>
> Stats of the day...
>
> I took an existing xz-compressed RPM, and built a newer release of that
> package with varying xz levels. The numbers are:
>
> - the new package size at that XZ compression level
> - the time to create a new deltarpm from a delta to that new version
>
One further question -- where does libz compression fit into these stats?
zlib compressed rpm was 1756k; applydeltarpm time ~1.3 seconds. (Yes, that
implies xz -2 is faster.)
Bill