bug#46881: 28.0.50; pdumper dumping causes way too many syscalls

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: Pip Cet <pipcet@gmail.com>,  46881@debbugs.gnu.org,  eggert@cs.ucla.edu
> Date: Fri, 05 Mar 2021 13:49:42 +0100
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > 30% slowdown and 1.5 sec absolute time difference doesn't sound bad
> > enough to me to justify a homemade solution.  I say let's go with
> > stdio.
> 
> Seems significant to me -- we're building Emacs a lot, and this bit
> can't be parallelised.  And the savings in electricity alone should make
> us go for the most efficient solution.
> 
> There doesn't seem to be any significant drawbacks to doing it the
> efficient way, either.

<Shrug> Fine, let's do it that way, then.