I just thought it checks/compares more signs in the case of $flag ne -1

$flag != -1 and $flag ne -1 aren't the same thing. ne is string comparison, and I could well imagine that it's slightly slower (but I really doubt that I'm able to prove that in a benchmark, so don't believe me).

Btw, what does "-MO=Concise" exactlly do ?

It's the same as use B::Concise;, which prints something like a syntax tree for the program. See B::Concise for more information.

In reply to Re^3: Which is faster ? by moritz
in thread Which is faster ? by thenetfreaker

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