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Re: yum-presto not on by default



On 09/23/2009 10:05 PM, Bill Nottingham wrote:
> Jonathan Dieter (jdieter 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?

-Toshio


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