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Re^3: Reading files n lines a time

by mbethke (Hermit)
on Dec 06, 2012 at 15:37 UTC ( #1007609=note: print w/ replies, xml ) Need Help??


in reply to Re^2: Reading files n lines a time
in thread Reading files n lines a time

Considering the OP deals with multi-GB files I'd prefer the slightly uglier assignment to $_ because the kite's tail is not optimized away so all the strings would actually be shoved through the binary negation twice.

I was surprised by the result BTW when I looked at the optree; I'm almost completely clueless about what Perl can and cannot optimize but it even a fairly trivial peephole optimizer as in early C compilers could catch this.


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