news: Store "from" and "subject" headers in the database.

diff --git a/NEWS b/NEWS
index 71c7c9afad232934f7264de74ff67b0da32437bc..88f7b204f8178c641e45969ca5fc307d8e7864cc 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -23,6 +23,21 @@ Add search terms to  "notmuch dump"
   search/show/tag. The output file argument of dump is deprecated in
   favour of using stdout.
 
+Optimizations
+-------------
+
+Search avoids opening and parsing message files
+
+  We now store more information in the database so search no longer
+  has to open every message file to get basic headers.  This can
+  improve search speed by as much as 10X, but taking advantage of this
+  requires a database rebuild:
+
+       notmuch dump > notmuch.dump
+       # Backup, then remove notmuch database ($MAIL/.notmuch)
+       notmuch new
+       notmuch restore notmuch.dump
+
 Notmuch 0.9 (2011-10-01)
 ========================