INSTALL: Note the advantages of Xapian 1.0.18+ and 1.1.4+

[notmuch] / INSTALL

diff --git a/INSTALL b/INSTALL
index bc7bc6778276490279dced12e32c0b39421695e5..9cf328eea3186910ad9dd5cbbc44893325d46b74 100644 (file)
--- a/INSTALL
+++ b/INSTALL
@@ -42,10 +42,12 @@ which are each described below:
 
        Xapian is available from http://xapian.org
 
-       After installing Xapian, please ensure that you have a command
-       named "xapian-config" on your $PATH as notmuch expects. (At
-       least one notmuch user found that Xapian installed the config
-       program to /usr/local/bin/xapian-config-1.1 ).
+       Note: Notmuch will work best with Xapian 1.0.18 (or later) or
+       Xapian 1.1.4 (or later). Previous versions of Xapian (whether
+       1.0 or 1.1) had a performance bug that made notmuch very slow
+       when modifying tags. This would cause distracting pauses when
+       reading mail while notmuch would wait for Xapian when removing
+       the "inbox" and "unread" tags from messages in a thread.
 
        GMime 2.4
        ---------