bug#36447: 27.0.50; New "Unknown keyword" errors

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: Eli Zaretskii <eliz@gnu.org>,  michael_heerdegen@web.de,  
> npostavs@gmail.com,  36447@debbugs.gnu.org
> Date: Fri, 05 Jul 2019 18:10:56 -0400
> 
> > Indeed. I'm attaching a proof of concept that we can simply freeze the
> > hash tables when dumping and thaw them when loading a dump, which
> > includes rehashing. Do you happen to know why it wasn't done that way?
> 
> I'd guess it was to shorten the startup time by doing this rehashing lazily.

The function pdumper-stats with show the time it took to load Emacs,
so the effect of this on the load time can be measured.