bug#31138: Native json slower than json.el

[Dmitry Gutov]

On 22.04.2019 19:28, Eli Zaretskii wrote:
> I meant make a loop that literally checks only for
> ASCII_CHAR_P, and nothing more.

Is this (attached) what you had in mind?

It's a bit faster again (naturally). At this point I don't see any 
statistically significant performance difference from the no_validation 
patch.

json_make_string_ascii_test_v2.diff
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