X-Recipient:	archive-cygwin AT delorie DOT com
DomainKey-Signature:	a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:mime-version:in-reply-to:references:date
	:message-id:subject:from:to:content-type; q=dns; s=default; b=qM
	Efd0lioVc7VeDlahxwE0yH8pBadoZx4rHlNdt+lZb+vUPutBJ2RU4YPA3stdAR7l
	CIwu2JD1hKjfWNKZuZ8XnmEGnJgXihUDtLv17b3cnkMjOvi4jk/YEnl3dbAGwubN
	s+Ff6DaCG4PfiZTTl4NFQxQnI4vRDaTIBvCcBXwNA=
DKIM-Signature:	v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:mime-version:in-reply-to:references:date
	:message-id:subject:from:to:content-type; s=default; bh=EZGwhXTB
	uJuFmgN/MgOdE2PfnJ4=; b=d82h8HXfe23DyiNXVaJfr/c/CO8Hw6DRS68w+ebe
	SrNmrzTOJw9ItIOwSyM5mglMLT8LdQQaM98DJGevx9WBSs45/wWqSoCKUB9PVn+r
	UxHzdGtDbnAB6kA6I46V/mrCmvl6ZOAmqusxHG92jml/4Yiz4Jr9M1U1zFRF1h8q
	xWY=
Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id:	<cygwin.cygwin.com>
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sourceware.org/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT com
Authentication-Results:	sourceware.org; auth=none
X-Virus-Found:	No
X-Spam-SWARE-Status:	No, score=-1.2 required=5.0 tests=AWL,BAYES_50,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=ham version=3.3.2 spammy=sk:stromek, stromeko AT nexgo DOT de, stromekonexgode, U*Stromeko
X-HELO:	mail-yk0-f181.google.com
X-Google-DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:content-type; bh=yAqseYi2o6AoXa7ZhiTxvF92rIiDxdZZqjneoz1mMiE=; b=MaofQVqhxGLFkovhxnTSH0AVWF8BvZ3mStEVcC0a2Ttt00KLWkcYdmTq9EMRzQGIcl CagAuUXtXy+QZIPz4Qg3i91j3ezE6DPEDYNzKTQPYAujC6E++jxKE5AGo/+x0d1nurW+ UbicFtto+S9iv7QnWjuI7I8TDjJQhPgtR3F4mD+A5rCfdeJNNgs/x+WkPDNi01ad8+ZX 7rDVBq9VosQ5rwE/oQu6x+MztTb6BBZ96wUHYr+fypAOu7PzHGYjQV5wApo8dokZuh9x SPFMYxO9ZU+xAykJzSqXI7g9IQsbYRvU7w6/dUBmcM1mXty7sxYiEsV22IvuugGWOcti gDQg==
X-Gm-Message-State:	ALoCoQmQhiIrQnw0LItsJW8n3+IPsZFn5RBGRJgIew3FbnR+/JSK1pkOZht9GhJQ/jAQAc9KasfvPbeOpNJB/sykTBEZuY3gLg==
MIME-Version:	1.0
X-Received:	by 10.37.13.139 with SMTP id 133mr14212682ybn.31.1453391581928; Thu, 21 Jan 2016 07:53:01 -0800 (PST)
In-Reply-To:	<loom.20160121T163405-489@post.gmane.org>
References:	<loom DOT 20160121T163405-489 AT post DOT gmane DOT org>
Date:	Thu, 21 Jan 2016 10:53:01 -0500
Message-ID:	<CAH5rLZVWiGz2n-3Ru-C0_5KU-Cc4NipJPn1NQVphN2UetUK4iA@mail.gmail.com>
Subject:	Re: Performance of "ls -F"
From:	"William M. (Mike) Miller" <william DOT m DOT miller AT gmail DOT com>
To:	cygwin AT cygwin DOT com
X-IsSubscribed:	yes

On Thu, Jan 21, 2016 at 10:44 AM, Achim Gratz <Stromeko AT nexgo DOT de> wrote:
> I am finding a large performance gap between plain "ls" and "ls -F" in a
> directory with many files on a network share (NetApp disguised as NTFS if
> that matters).  This has been there for quite a while, I've just now
> realized what the reason was (I have "ls -F" as an alias for "ls" in my
> interactive shells).  In a directory with 1300 files, a plain "ls" completes
> in 0.3s, while "ls -F" requires about 95s.  Determining the file class seems
> to require around 70...90ms per file, which I can confirm also for
> directories with a lot less files.  What's involved in that determination
> that takes such a long time?

The overhead appears to be in checking for executable files; using
--file-type instead of -F, which just omits the '*' category, reduces
the time for ls in one of my (local) large directories from over one
second to 0.04 seconds.

-- 
William M. (Mike) Miller | Edison Design Group
william DOT m DOT miller AT gmail DOT com

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple

- Raw text -