Re: please eat my data!

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+From: Stewart Smith <stewart@flamingspork.com>\r
+To: Sebastian Spaeth <Sebastian@SSpaeth.de>, Jameson Rollins\r
+       <jrollins@finestructure.net>, Notmuch list <notmuch@notmuchmail.org>\r
+Subject: Re: please eat my data!\r
+In-Reply-To: <87iq7wpubw.fsf@SSpaeth.de>\r
+References: <87633wlrrk.fsf@SSpaeth.de>\r
+       <87tyrgeopc.fsf@servo.finestructure.net> <87iq7wpubw.fsf@SSpaeth.de>\r
+Date: Mon, 12 Apr 2010 10:14:05 -0700\r
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+\r
+On Mon, 12 Apr 2010 17:24:35 +0200, "Sebastian Spaeth" <Sebastian@SSpaeth.de> wrote:\r
+> What I find intersting is that we have a 2x speedup and a 10x speedup\r
+> for different queries. Olly was saying on IRC that both *should* really be\r
+> behaving in much the same manner.\r
+\r
+Remember that on ext3 (and pretty sure ext4) fsync is the same as\r
+sync(). So performance depends on how much dirty data you have in your cache.\r
+\r
+libeatmydata also gets rid of msync(), O_SYNC etc as well.\r
+\r
+-- \r
+Stewart Smith\r