If that is absurd then

while N <<< L: 
  G = G of S
[download]

is absurd too. The right hand side of ... is just a condition, nothing more. If you're saying that things get absurd when the condition is so expensive that it dwarfs the loop body, then yeah. But then your code is bad, not the semantics of the language.

I might be still be missing the point, though.

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