Subject: bug#22239: fgrep -i slow in 2.21

From: Ondřej Cífka <[email-masked]>
Date: Fri, 25 Dec 2015 23:44:42 +0100

When running "grep -Fi -f list.txt" where list.txt has thousands of
lines, it takes orders of magnitude longer to process the input file
than without the -i. This was not the case in grep 2.16, where fgrep
-i was about as fast as fgrep.

--
Ondřej Cífka