which json lib to use?

[Daniel Gruno <hu...@apache.org>]

Hi folks,
I was looking at foal and seem to have made the observation that the 
most cpu time is being spent on json decode/encode. Thus, I was 
wondering if people have experience with the faster json libraries out 
there, like orjson or rapidjson. Can we use one of the faster libraries 
as a drop-in replacement?