Am 06.10.2014 um 13:00 schrieb Richard W.M. Jones:
On Mon, Oct 06, 2014 at 04:41:07AM -0400, Rahul Sundaram wrote:One of the long standing features that were enabled by default in yum is support for delta rpms. dnf developers have disabled this and I think this change deserves a broader discussion https://bugzilla.redhat.com/show_bug.cgi?id=1148208The amount of time taken to rebuild rpms from delta rpms meant that they didn't seem to save anything for me. I had always assumed that this is because the rebuilding code was written in Python. In fact this is not so! Although the yum-presto plugin is written in Python, it just calls out to the applydeltarpm program written in C (assuming I'm looking at the right place: https://gitorious.org/deltarpm/deltarpm). Has anyone analyzed why the rebuild step is slow? Seems like the best thing to do would be to make it faster if possible
because it needs to build the complete xz-compressed RPM there was a discussion here not that long ago
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