bug#31138: Native json slower than json.el

[Eli Zaretskii]

> From: yyoncho <yyoncho@gmail.com>
> Date: Sat, 23 Mar 2019 23:04:18 +0200
> Cc: Sébastien Chapuis <sebastien@chapu.is>, 
>       31138@debbugs.gnu.org
> 
> I will try with run-hooks = nil. (I still cannot reproduce the issue 
> consistently). As a side note, I think that similar
> issue affects emacs dynamic modules based on my limited testing. Please reply 
> back if you need a callstack.

Yes, a callstack in the case of modules would be helpful (although I
think I can guess where it will point).

Thanks.