Re: [PATCH] Keep last used delta base in the delta window

Martin Koegler [off-list ref] writes:

Keeping the last used delta base object, if it would be dropped,
supports creating smaller packs with shorter delta chains.

Instead of treating the "the last used one happened to be on the
horizon -- try not to drop it" special case, I wonder if it
makes sense to float the last used delta base object early in
the window _after_ it is used.  Wouldn't we keep more than one
very recently used delta base objects in the window that way?