Yes, that was a specific goal.
> I just want to make sure the performance improvements you're seeing
> caused by the fix of this _particular_ problem.
Of course I chose the test load to show the benefit clearly, but I
also tried to avoid disturbing any of the existing cases that are
working well. I did the verification and audit in a hurry, so I
wouldn't be surprised at all if I missed something, but I feel
equally that picking these up is more a matter of adjustment than
change in viewpoint.
> If we knew the amount of non-used-once pages which drop_behind() is
> deactivating under _your_ tests, we could make absolute sure about
> the problem.
Yes, for sure, it's time to use the statistics weapon. I guess we
need to add in a couple more sensor points. An obvious place is in
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