From: Andreas Schwab <schwab@suse.de>
To: Miles Bader <miles@gnu.org>
Cc: "Lennart Borgman \(gmail\)" <lennart.borgman@gmail.com>,
Emacs Devel <emacs-devel@gnu.org>
Subject: Re: Why does not rgrep use "grep -r"?
Date: Sat, 03 Nov 2007 00:29:20 +0100 [thread overview]
Message-ID: <jetzo4ql9r.fsf@sykes.suse.de> (raw)
In-Reply-To: <87ve8k8dyw.fsf@catnip.gol.com> (Miles Bader's message of "Sat\, 03 Nov 2007 07\:44\:23 +0900")
Miles Bader <miles@gnu.org> writes:
> I don't know the reason of the rgrep authors (though I suspect it was
> portability concerns), but I have noticed something odd about "grep -r":
> -- sometimes it seems _much_ slower than "find ... -type f | xargs grep"
> on very large trees (I think I noticed with trees in NFS, where speed is
> a perennial issue).
Probably because find has been optimized for, umm, finding files. There
are quite a few things you can do to speed up directory traversal.
Andreas.
--
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
PGP key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
next prev parent reply other threads:[~2007-11-02 23:29 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-02 21:42 Why does not rgrep use "grep -r"? Lennart Borgman (gmail)
2007-11-02 22:44 ` Miles Bader
2007-11-02 23:29 ` Andreas Schwab [this message]
2007-11-02 23:56 ` Lennart Borgman (gmail)
2007-11-03 1:31 ` Miles Bader
2007-11-03 1:45 ` Lennart Borgman (gmail)
2007-11-03 3:37 ` Miles Bader
2007-11-03 8:40 ` Eli Zaretskii
2007-11-03 9:43 ` David Kastrup
2007-11-03 11:01 ` Eli Zaretskii
2007-11-03 11:54 ` Lennart Borgman (gmail)
2007-11-04 18:59 ` David Kastrup
2007-11-05 5:24 ` Eli Zaretskii
2007-11-03 4:01 ` Ken Raeburn
2007-11-03 8:41 ` Eli Zaretskii
2007-11-03 8:37 ` Eli Zaretskii
2007-11-03 14:01 ` Stefan Monnier
2007-11-04 0:57 ` Kim F. Storm
2007-11-04 1:03 ` Lennart Borgman (gmail)
2007-11-04 1:15 ` Miles Bader
2007-11-04 10:32 ` Jason Rumney
2007-11-04 11:32 ` Lennart Borgman (gmail)
2007-11-04 11:48 ` Jason Rumney
2007-11-04 12:01 ` Lennart Borgman (gmail)
2007-11-05 5:22 ` Eli Zaretskii
2007-12-12 1:56 ` Lennart Borgman (gmail)
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