When is it appropriate to use String::NewSymbol() rather than
String::New()? I assume that symbols are mainly for oft-reused
property names; is this correct? Is obj-
>Set(String::NewSymbol('foo'), value) somehow more efficient than obj-
>Set(String::New('foo'), value)?
Is a Symbol effected differently by the current HandleScope? I often
see people using Persistent symbols for property names and event
identifiers; is this internally more efficient than using string
values?
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