bug#31138: Native json slower than json.el

[Dmitry Gutov]

On 22.04.2019 18:25, Eli Zaretskii wrote:

> > But not a better measurement of how json.c is actually used, I'm afraid
> > (unless you're trying to cut out the time Emacs spends reading from
> > disk). So even if my benchmark gives more attention to buffer-decoding
> > routines, it probably reflects practical usage too (JSON usually comes
> > from HTTP response, and it has to be decoded as well).
>
> But it shows the upper limit of what we can expect,
Not if we manage to optimize the commonly-used subroutines as well.

insert-file-contents probably uses code_convert_string somewhere inside, 
right?