Date: Thu, 08 Jun 2023 13:40:53 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 271906] Aparent performance problem with basic and extended regular expressions Message-ID: <bug-271906-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D271906 Bug ID: 271906 Summary: Aparent performance problem with basic and extended regular expressions Product: Base System Version: 13.2-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Many People Priority: --- Component: bin Assignee: bugs@FreeBSD.org Reporter: marius@isgate.is 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=20 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!=20 Even worse is=20 $ 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 --=20 You are receiving this mail because: You are the assignee for the bug.=
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