Date: Wed, 02 Jun 2021 18:20:11 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 223532] GNU egrep -i is terrible slow if utf-8 locale is enabled Message-ID: <bug-223532-227-w1cI9TtIFK@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-223532-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=223532 Stefan Eßer <se@FreeBSD.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |se@FreeBSD.org --- Comment #4 from Stefan Eßer <se@FreeBSD.org> --- Created attachment 225506 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=225506&action=edit Build with WITH_INTERNAL_NOSPEC for better performance Building with -DWITH_INTERNAL_NOSPEC makes "fgrep -i" use the internal implementation of the comparison function instead of regcomp() from the C library. The performance impact of using -i with or without UTF-8 is only a factor of about 3 instead of 100: $ LANG=C time fgrep zpipe /usr/ports/INDEX-14 0.03 real 0.03 user 0.00 sys $ LANG=en_US.UTF-8 time fgrep zpipe /usr/ports/INDEX-14 0.03 real 0.03 user 0.00 sys $ LANG=en_US.UTF-8 time fgrep -i zpipe /usr/ports/INDEX-14 0.10 real 0.09 user 0.00 sys $ LANG=en_US.UTF-8 time fgrep-ORIG -i zpipe /usr/ports/INDEX-14 4.47 real 4.47 user 0.00 sys (fgrep has been built with WITH_INTERNAL_NOSPEC, while fgrep-FBSD is a copy of the original FreeBSD fgrep built without that option.) Both the original version and the modified version fail the same 4 kyua tests, BTW. -- You are receiving this mail because: You are the assignee for the bug.help
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