There seem to be a regression in version 13 of FreeBSD affecting both basic and extended regular expression processing. Illustration of problem (grep): $ uname -a FreeBSD 13.2-RELEASE releng/13.2-n254617-525ecfdad597 GENERIC $ time grep -E '(wordorphrase|differentword)' 150MB-file >/dev/null real 0m54.565s user 0m54.372s sys 0m0.173s should not take almost a minute to search 150MB file! Even worse is $ time grep -i 'differentword' 150MB-file >/dev/null real 0m28.060s user 0m28.016s sys 0m0.038s almost 30 sek to do a case-insensitive search on a 150MB text file - compared to: $ time grep 'differentword' 150MB-file >/dev/null real 0m0.210s user 0m0.178s sys 0m0.032s which runs at normal speed. This all was fine on 12.3 and 12.4 - For example: $ uname -a FreeBSD 12.3-RELEASE-p11 GENERIC $ time grep -E '(wordorphrase|differentword)' 150MB-file >/dev/null real 0m0.290s user 0m0.219s sys 0m0.071s
*** This bug has been marked as a duplicate of bug 271906 ***