bug#50777: Dropping EIEIO from xref (for performance)

[Lars Ingebrigtsen]

Dmitry Gutov <dgutov@yandex.ru> writes:

> The ones that do can be updated to rely on the recommended public
> interface: the xref-make-* constructors and the generic functions to
> access the data. This will keep the code compatible with both new and
> previous versions of Xref.
>
> I'd like to push it soon, so users of Emacs 28 can enjoy the speedup.
>
> What do people think?

Speedups would be nice, but I think this sounds like a very big change
to make to such a central system (that I think many third-party packages
rely on) at this point, so I'm leaning towards it being in Emacs 29
instead.  

-- 
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   bloggy blog: http://lars.ingebrigtsen.no