As for ugly vs ugly_cr,

$1 is a magic variable. Everytime you read from it, it gets repopulated (the matched substring is copied into it from the matched string) and subsequently numified. ugly_cr is faster because it cuts down the number of times that happens by four.

As for any vs any_cr,

The anon subs in any don't capture any variables, but the ones in any_cr capture two. Introducing capturing adds overhead that's more expensive than the magic on $1.

Update: Added "and subsequently numified".

Update: Confirmed that the overhead from capturing is the culprit, and adjusted the text appropriately. I confirmed this by changing all four any { ... } to any { $data; ... }. With this change, any becomes slower than any_cr.

In reply to Re: Why is "any" slow in this case? by ikegami
in thread Why is "any" slow in this case? by Anonymous Monk

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