From: Ivan Adzhubey <iadzhubey@rics.bwh.harvard.edu> To: sisyphus@lists.altlinux.org Subject: [sisyphus] Huge regression in "grep -i" performance Date: Sun, 14 Aug 2011 23:36:54 -0400 Message-ID: <201108142336.55033.iadzhubey@rics.bwh.harvard.edu> (raw) Доброго времени суток всем! Похоже, у нас в Сизифе регрессия: https://bugzilla.redhat.com/show_bug.cgi?id=194471 Причем, в отличие от описанного в федоровской багзилле, у нас и fgrep точно так же тормозит под UTF. Так что я не уверен, что это именно этот баг, просто точнее ничего не нашел. $ time grep -i ^1ko9 pdb.fragm 1ko9 A 1 312 12 323 0.90user 0.00system 0:00.91elapsed 99%CPU (0avgtext+0avgdata 3824maxresident)k 0inputs+0outputs (0major+297minor)pagefaults 0swaps $ time fgrep -i 1ko9 pdb.fragm 1ko9 A 1 312 12 323 0.93user 0.00system 0:00.93elapsed 99%CPU (0avgtext+0avgdata 3216maxresident)k 0inputs+0outputs (0major+250minor)pagefaults 0swaps $ LANG=C time grep -i ^1ko9 pdb.fragm 1ko9 A 1 312 12 323 0.06user 0.00system 0:00.06elapsed 98%CPU (0avgtext+0avgdata 3136maxresident)k 0inputs+0outputs (0major+254minor)pagefaults 0swaps $ wc -l pdb.fragm 344603 pdb.fragm $ echo $LANG en_US.UTF-8 $ grep --version grep (GNU grep) 2.9 Copyright (C) 2011 Free Software Foundation, Inc. --Иван
next reply other threads:[~2011-08-15 3:36 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2011-08-15 3:36 Ivan Adzhubey [this message] 2011-08-15 19:25 ` Dmitry V. Levin 2011-08-15 20:52 ` Dmitry V. Levin 2011-08-16 1:09 ` Ivan Adzhubey
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