Your message dated Tue, 20 Dec 2016 21:17:01 -0800 with message-id <3a0eb353-96a4-80fd-5f3c-7fd77be096a0@cs.ucla.edu> and subject line Re: bug#22357: grep -f not only huge memory usage, but also huge time cost has caused the debbugs.gnu.org bug report #21763, regarding poor performance since grep 2.19 when comparing files with grep to be marked as done. (If you believe you have received this mail in error, please contact help-debbugs@gnu.org.) -- 21763: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=21763 GNU Bug Tracking System Contact help-debbugs@gnu.org with problems