Notmuch new speed degradation

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+Date: Thu, 24 Jul 2014 12:19:16 +0400\r
+From: Dmitry Bogatov <KAction@gnu.org>\r
+To: notmuch@notmuchmail.org\r
+Subject: Notmuch new speed degradation\r
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+Hello!\r
+\r
+I have ~ 3 000 000 mails. I wanted to index them.\r
+First 1 000 000 took several hours, next 200 000 took several days.\r
+\r
+And now, even with libeatmydata, it takes ~ 4 sec for a file.\r
+\r
+Is it any way I can improve perfomance?\r
+\r
+PS. Please, keep me in CC.\r
+\r
+--\r
+Best regards, Dmitry Bogatov <KAction@gnu.org>,\r
+Free Software supporter, esperantisto and netiquette guardian.\r
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