linux-ext4 - Re: [PATCH] Faster ext2_clear

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Message-ID: <20070709200003.GA18501@lazybastard.org>
Date:	Mon, 9 Jul 2007 22:00:03 +0200
From:	Jörn Engel <joern@...fs.org>
To:	Alexey Dobriyan <adobriyan@...il.com>
Cc:	Jörn Engel <joern@...fs.org>, akpm@...l.org,
	linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH] Faster ext2_clear_inode()

On Mon, 9 July 2007 22:01:48 +0400, Alexey Dobriyan wrote:
> 
> Yes. Note that ext2_clear_inode() is referenced from ext2_sops, so even
> empty, it leaves traces in resulting kernel.

Is that your opinion or have you actually measured a difference?
I strongly suspect that compilers are smart enough to optimize away a
call to an empty static function.

Jörn

-- 
Fancy algorithms are slow when n is small, and n is usually small.
Fancy algorithms have big constants. Until you know that n is
frequently going to be big, don't get fancy.
-- Rob Pike
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