bug#31138: Native json slower than json.el

[Dmitry Gutov]

On 22.04.2019 20:26, Eli Zaretskii wrote:
> I don't think we should abort, we don't do that anywhere else.

The key word here is "validation". If certain folks in this discussion 
are right, libjansson always returns valid utf-8 encoded strings, or 
intends to.

So if we implement fast validation for multibyte strings as well, the 
"else" branch should never be taken, and it would make sense to abort in 
that case. Not necessarily abort as in "exit Emacs", but maybe signal an 
error. The libjansson developers might in the end be thankful for bug 
reports.