bug#31138: Native json slower than json.el

[Dmitry Gutov]

On 21.04.2019 11:58, Eli Zaretskii wrote:
> I profiled the code, and my results are very similar to yours.  My
> interpretation of the results is that decoding strings that we receive
> from the jansson library takes less than 10% of the CPU time.  So I
> think we don't need to worry about this aspect when considering
> parsing of JSON objects.

Eli, how did you reach that conclusion?

One: looking at the profile, libjansson is somewhere down below, and 
most of the runtime is taken by Emacs.

Two: while I might be misreading the profile, simply omitting the 
decoding function call (and using the returned strings as-is) halves the 
execution time.

How could that be compatible with your interpretation?