bug#31138: Native json slower than json.el

[Dmitry Gutov]

On 21.04.2019 16:33, Philipp Stephani wrote:
> Am So., 21. Apr. 2019 um 15:10 Uhr schrieb yyoncho<yyoncho@gmail.com>:
> > Hi Philipp,
> >
> > As Eli commented in this thread, the decoding is must have for all external 
> > libraries no matter what is their contract.
> I disagree.

If I simply apply the patch from 
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=31138#5, that breaks tests 
in test/src/json-tests.el. In particular, json-parse-string/string:

F json-parse-string/string
    (ert-test-failed
     ((should
       (equal
        (json-parse-string "[\"abcαβγ\"]")
        ["abcαβγ"]))
      :form
      (equal
       ["abc\316\261\316\262\316\263"]
       ["abcαβγ"])
      :value nil :explanation
      (array-elt 0
                 (arrays-of-different-length 9 6 
"abc\316\261\316\262\316\263" "abcαβγ" first-mismatch-at 3))))

Would somebody like to propose an alternative patch?