yum-presto not on by default

[Warren Togami]

On 10/04/2009 04:45 PM, drago01 wrote:
> On Sun, Oct 4, 2009 at 10:42 PM, Eric Springer<erikina at gmail.com>  wrote:
>> On Mon, Oct 5, 2009 at 5:05 AM, Adam Williamson<awilliam at redhat.com>  wrote:
>>>
>>> Quick follow-up on this issue: I heard that this part at least has been
>>> done, and it certainly seems to have done the trick. Delta rebuild
>>> speeds have increased approx ten-fold here, and are now faster than my
>>> (pretty quick) download speeds.
>>
>> Is it possible to do the rebuilds in parallel? I noticed that only one
>> of my four cores was used. And that on smolt 63% of people have a
>> dual-core or greater, so it could lead to massive speed-ups as well.
>
> xz is not threaded yet, I did some benchmark on my core i7 systems:
>

Although that isn't a problem if multiple packages are reconstructed 
simultaneously.

Warren