No more deltarpms by default

Jon jdisnard at
Fri Oct 17 16:05:36 UTC 2014

On Mon, Oct 6, 2014 at 8:07 AM, Stephen Gallagher <sgallagh at> wrote:

[ . . . ]

> It would be nice to see if we can find ways to improve the performance
> of the deltarpm reconstruction instead. Much of the time is spent on
> compression/decompression tasks which *should* be massively parallel; we
> should be able to speed this up by taking advantage of additional cores
> (and hyperthreading) on the system, for example. Another option might be
> not to bother recompressing the RPMs but instead just install an
> uncompressed RPM (and possibly recompress it out of band if we needed to
> keep it in the cache).

export XZ_OPT=T0

If that were enabled in the environment the XZ compression phase would
be significantly faster.


-Jon Disnard

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