02-24-2011
Quote:
Originally Posted by
Corona688
Is this GNU grep? The GNU utilities, unusually, try to handle your character set as appropriate. This means when you tell it to be case insensitive, that busts out some pretty heavy-duty routines in order to do so properly.
It is GNU grep. Wow, 200 times longer for case insensitive grep. Those routines sound very heavy.
Is this a known fact?
is x200 the upper bound of the performance penalty, regardless the length of the input string? (thinking n-character long string will have 2^n case permutations).
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