Re: deltarpm usefulness?

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On Sun, 7 Nov 2021 at 13:44, Gordon Messmer <gordon.messmer@xxxxxxxxx> wrote:
>
> On 11/7/21 01:14, Rajeesh K V wrote:
> > Deltarpm did
> > reduce a lot of update download size for many years since 2007
>
>
> I remember seeing 60-70% reduction really often, and 90+ periodically.
> I've read Kevin's explanation of why it's not working as well now, but I
> wonder what changed between the early implementation when results were
> very good and now, when they really aren't.
>

My guess is that we hit a sweet spot at a certain time, and we would
need to constantly tune deltarpm to find it. Compiler changes, link
tool changes, different options in a compile, etc can cause code to
look different enough that the diff is larger at times (even if the
underlying machine code is the same, just put in different places in
the executable.)


-- 
Stephen J Smoogen.
Let us be kind to one another, for most of us are fighting a hard
battle. -- Ian MacClaren
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