Date: Thu, 08 Jun 2023 13:34:57 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=271904 Bug ID: 271904 Summary: Aparent performance problem with basic and extended regular expressions Product: Base System Version: 13.2-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Many People Priority: --- Component: bin Assignee: bugs@FreeBSD.org Reporter: firstname.lastname@example.org There seems to be a regression in version 13 of FreeBSD affecting both basic and extended regular expression processing in (for example) grep(1). Slow search when using '(|)': $ 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 -- You are receiving this mail because: You are the assignee for the bug.