bug#31138: Native json slower than json.el

[Dmitry Gutov]

On 22.04.2019 19:49, Eli Zaretskii wrote:

> Btw, we could somewhat speed up even the case where we do call
> code_convert_string, by avoiding the call to make_specified_string.
> That's because decode_coding_object, called by code_convert_string to
> perform the decoding, is capable of decoding a C string, if we set up
> its argument accordingly.

Guess we could test that with a non-ascii sample.

I was kind of expecting to continue on the "fast validation" route, and 
check whether DATA contains non-ASCII bytes in the exact way we want 
them. And simply abort otherwise.

> You can see one example of that in
> w32select.c:w32-get-clipboard-data.

Hmm, I'm not seeing any calls to code_convert_string in w32select.c.