bug#31138: Native json slower than json.el

[Eli Zaretskii]

> From: yyoncho <yyoncho@gmail.com>
> Date: Sun, 24 Mar 2019 20:24:35 +0200
> Cc: Sébastien Chapuis <sebastien@chapu.is>, 
>       31138@debbugs.gnu.org
> 
> Before starting to test the patch I saw that Fget_buffer_create is running 
> Qbuffer_list_update_hook - do we
> need to do a similar thing for it too?

Maybe, but let's first see if the patch as I sent is already producing
some positive effect, shall we?