Your conclusion is correct but your methods are dodgy. B::Deparse doesn't tell you anything about how things are compiled or executed internally and it can be incorrect or just misleading. For accuracy, use B::Concise or something else that shows you the compiled optree. B::Deparse attempts to produce some sensible perl code based on the optree but it isn't really an oracle and it isn't always right.
Added

B::Deparse is supposed to produce canonically correct output as a core goal and it does really well. It just isn't so perfect. It also won't tell you that '...' is internally the same thing as "...". (it is)

In reply to Re^2: Differences between " " and ' '? by diotalevi
in thread Differences between " " and ' '? by Ace128

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