Re: emacs rendering comparisson between emacs23 and emacs26.3

[Richard Stallman]

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  > > 1. If the slowdown cases are truly rare, I don't think they will bother
  > > users very often.

  > A frequent case is that the use case is rare on the average, but for
  > some user(s) it is not so rare.

Yes.  I don't think we can attain perfection, so I'm suggesting a guideline
so we can do better overall without too much extra work.

  > I think we do try: patch review frequently has these aspects
  > discussed.  But it is a well known fact that humans are lousy
  > predictors of code speed.

I'm not suggesting we try to _predict_ the effect on code speed,
rather than we have a guideline to identify the cases where _if_
the code gets slower it would be hard for a user to escape that.

What we would do, in those cases, is add a switch to turn off
the changes.



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