grep unusable in UTF-8?

[Valery Ushakov <uwe%stderr.spb.ru@localhost>]

On a ppc mini g4 (1.25MHz).

  $ LC_CTYPE=C time grep pool messages > /dev/null
          0.01 real         0.00 user         0.00 sys

but in a UTF-8 locale:

  $ LC_CTYPE=en_US.UTF-8 time grep pool messages > /dev/null
          9.54 real         9.38 user         0.01 sys

though when there are no matches:

  $ LC_CTYPE=en_US.UTF-8 time grep fool messages > /dev/null
          0.05 real         0.03 user         0.01 sys


So a UTF-8 locale seems to make grep unusable for practical purposes. %-O

-uwe