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Why is `\s+` so much faster than `\s\s*` in this Perl regex?

Author Votes Δ
Thomas Ayoub 28 +2.17
ThisSuitIsBlackNot 16 +0.25
zdim 12 -0.05
xxfelixxx 7 -1.84
Last visited: Oct 16, 2016, 6:45:46 PM