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I moved things around so that what code does is roughly equivalent. As you can see Dart is slower, but the Dart runtime does not differ by a margin that matters for many applications - and note the size of the gap differs significantly between JS engines.

In all fairness, you removed the actual print function from the code. Inspection of the non-compiled source suggests that the entire function execution as shown in /2 is called for every call to Dart's print.

print$getter()(1, $noargs, 'Hello, Dart!'); print$getter()(1, $noargs, 'foo'); print$getter()(1, $noargs, 'bar');

I did not remove print. Google Closure Compiler does inlining as well.

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