Thanks for your report. This is know upstream and a patch has been proposed.
** Changed in: grep (Ubuntu) Status: New => Confirmed ** Bug watch added: GNU Savannah Bug Tracker #14472 http://savannah.gnu.org/bugs/?14472 ** Also affects: grep via http://savannah.gnu.org/bugs/?14472 Importance: Unknown Status: Unknown -- huge performance hit for -i with UTF-8 locales https://bugs.launchpad.net/bugs/75695 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs