Date: Mon, 10 May 2021 13:05:03 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 254763] grep very slow with 13.0-RC4 Message-ID: <bug-254763-227-X49hfPKdKX@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-254763-227@https.bugs.freebsd.org/bugzilla/>
index | next in thread | previous in thread | raw e-mail
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=254763 --- Comment #4 from parv <parv.0zero9+freebsd@gmail.com> --- (In reply to Mark Millard from comment #2) (A tolerable search would finish within ~1-2 second.) Re: caching of file resulting in faster search ... I created a 12 GB file filled with 0; searched for single letter via fgrep; caused swap to increase to ~1 GB (swap size is 8 GB); lots of crunchy noise ensued. When I had enough, I ran egrep sans -i option ... 1.16 real 0.07 user 0.30 sys ... and result after loading RAM as mentioned above for "egrep -i" ... 49.13 real 45.28 user 0.63 sys Relative time difference between two type of searches is rather consistent. There is ~4-5 second improvement (time result hover around 43-45 second) for "egrep -i" if it is run just after "egrep" or "egrep -i". FWIW, configuration here ... - FreeBSD 13-STABLE as guest of Windows 10 host in VirtualBox 5.2.44; - /src-build/ports/INDEX-13 file is on separate pool of ZFS than the pool of /usr/bin/egrep; - file systems are file-backed, allocated as SATA disks; - real memory: 8663 MB, avail memory: 7809 MB (of 16 GB RAM); - 2 "CPU"s have been allocated of Intel i5 6300U (Thinkpad X260). -- You are receiving this mail because: You are the assignee for the bug.home | help
Want to link to this message? Use this
URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-254763-227-X49hfPKdKX>