Ah, I see. Using JSON means you have no external dependency. If the performance is good enough, it would be a compelling choice.
I was going to jokingly say you could use JSON.encode and :jiffy.decode 
Best of both. Or not.
I think a problem with those benchmarks might be that they don’t do the same thing your project likely does. You might have differently shaped data, nested maps, lists, short and long strings, etc.
Also, your application performance might depend on other things, such that the choice of JSON library wouldn’t make a difference to the overall performance.
