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Chrome can print live expression on Console Live Demostration

Faster app with JSON.parse()

https://www.youtube.com/watch?v=ff4fgQxPaO0

Why the JSON.parse() is faster than JavaScript literal?

JSON.parse accept string only, JS literal will consider the types.
Different on how to deal with {. In parse(), { neans aN object ONLY. But JS need work much harder to guess if it's other syntax.