[Bug 223532] egrep -i is terrible slow if utf-8 locale is enabled

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=223532

--- Comment #1 from Kyle Evans <kevans at freebsd.org> ---
Is this gnugrep or bsdgrep? (`egrep -V`) I'm getting something along these
lines with your reproduction steps:


root at www2:/usr/bin # env LANG=en_CA.UTF-8 time egrep -c foobar /tmp/tcsh400
0
        1.13 real         0.73 user         0.08 sys
root at www2:/usr/bin # env LANG=en_CA.UTF-8 time egrep -ic foobar /tmp/tcsh400
0
        3.73 real         3.26 user         0.08 sys

root at www2:/usr/bin # env LANG=C time egrep -c foobar /tmp/tcsh400
0
        1.08 real         0.72 user         0.06 sys
root at www2:/usr/bin # env LANG=C time egrep -ic foobar /tmp/tcsh400
0
        1.11 real         0.74 user         0.07 sys



With:

root at www2:/usr/bin # grep -V
grep (BSD grep, GNU compatible) 2.6.0-FreeBSD

So egrep -i is still slower with bsdgrep, but it's only 3x slower than the
equivalent case-sensitive search here.

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