bug#38492: 27.0.50; Warn pdumper users when pure space has been overflowed

[Richard Stallman]

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  > AFAICT, the purespace provides the same benefit with portable dumping as
  > it does with unexec.  The benefit is to save time during the GC by not
  > traversing the purespace.  It's basically an "old" generation in a kind
  > of very restricted form of generational GC.

I never thought about it that way, but I guess you are right.
(The original intended benefit was to share memory between Emacs processes.)

Perhaps for this reason we should keep pure space.

It would be interesting to measure the effect on eliminating pure space
on the speed of a GC-intensive task.

-- 
Dr Richard Stallman
Founder, Free Software Foundation (https://gnu.org, https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)