plotly is using __proto__ which slows down the script?! #1445

Hello,
I have found that in FF browser i got a warning telling:
"mutating the [[Prototype]] of an object will cause your code to run very slowly; instead create the object with the correct initial [[Prototype]] value using Object.create"

When I search the net what does that means I have found this stackoverflow ticket: http://stackoverflow.com/questions/23807805/why-is-mutating-the-prototype-of-an-object-bad-for-performance

Can you say something about that? Does it really impact the performance?

Best regards,
Marcin