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[Bug libc/6606] New: UTF-8 locale MUCH slower


it seems that things are much slower with a utf8 locale than with C/POSIX.

for instance, i made a 91mb testfile:
redeeman@quadstation # export LC_ALL=C
redeeman@quadstation # time grep gah testfile
grep gah testfile  0.12s user 0.04s system 99% cpu 0.165 total
redeeman@quadstation # export LC_ALL=en_GB.UTF-8
redeeman@quadstation # time grep gah testfile
grep gah testfile  2.87s user 0.05s system 99% cpu 2.927 total

-- 
           Summary: UTF-8 locale MUCH slower
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: drepper at redhat dot com
        ReportedBy: redeeman at metanurb dot dk
                CC: glibc-bugs at sources dot redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=6606

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