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Phanx: Sorry, what I meant to say was not that I don't understand the statement, but that I don't understand the reasoning behind it, which appears counter-intuitive to me.
If we take your first and second examples, what do you gain by moving the variable into the loop? It seems like you just define 4 variables instead of just 1, which means more CPU time spent on creating the variable and more work for the GC.
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