notmuch-hello buffer slow doe to slow query

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+From: Nils Dagsson Moskopp <nils@dieweltistgarnichtso.net>\r
+To: notmuch@notmuchmail.org\r
+Subject: notmuch-hello buffer slow doe to slow query\r
+User-Agent: Notmuch/0.17 (http://notmuchmail.org) Emacs/23.4.1\r
+       (i486-pc-linux-gnu)\r
+Date: Fri, 11 Apr 2014 12:22:19 +0200\r
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+--=-=-=\r
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+Hello,\r
+\r
+If notmuch-hello includes a saved search with a slow query, switching to\r
+a notmuch-hello buffer is very slow due to notmuch-mode updating counts\r
+for search results. mjw1009 suggested "(setq notmuch-hello-auto-refresh\r
+nil)", which stops the counting and works around the problem.\r
+\r
+Fundamentally, the problem is a slow query. On my laptop (Thinkpad T60),\r
+many things are pretty much instant, even though I have a HDD, no SSD:\r
+\r
+> ; time notmuch count 'tag:inbox and tag:list'\r
+> 25452\r
+> 0.02user 0.00system 0:00.03elapsed 72%CPU (0avgtext+0avgdata 3852maxresid=\r
+ent)k\r
+> 0inputs+0outputs (0major+1135minor)pagefaults 0swaps\r
+\r
+However, from-queries take their time:\r
+\r
+> ; time notmuch count 'not tag:replied and to:nils@dieweltistgarnichtso.ne=\r
+t'\r
+> 5328\r
+> 0.10user 0.15system 0:14.14elapsed 1%CPU (0avgtext+0avgdata 3472maxreside=\r
+nt)k\r
+> 157544inputs+0outputs (0major+1039minor)pagefaults 0swaps\r
+\r
+mjw1009 can reproduce if the from-query contains an "@" and thinks the\r
+problem may be "something deeper down in notmuch (actually probably in\r
+xapian)".\r
+\r
+\r
+Greetings,\r
+=2D-=20\r
+Nils Dagsson Moskopp // erlehmann\r
+<http://dieweltistgarnichtso.net>\r
+\r
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