[Bug libc/12100] QoI regression: strstr() slowed from O(n) to O(n^2) on SSE4 machines

[liubov.dmitrieva at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=12100

--- Comment #9 from Liubov Dmitrieva <liubov.dmitrieva at gmail dot com> 2012-06-29 12:57:25 UTC ---
SSE42 strstr is quadratic at worst but still better in general cases than
current 2way algo.

If new Ondrej's SSE algorithm or current 2way version with applied path [1]
will be better for real life cases then SSE42 strstr should be eliminated.

But I agree with Ulrich that for strstr long needles is not important in real
life. People use memmem instead.

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