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

[notmuch] / NEWS

diff --git a/NEWS b/NEWS
index b44b11e2d39d715bdc46cb8aa7bf50a4525a6022..88f7b204f8178c641e45969ca5fc307d8e7864cc 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -4,9 +4,9 @@ Notmuch 0.10 (2011-xx-xx)
 New build and testing features
 ------------------------------
 
-Emacs tests are now done in screen. This means that screen is now
+Emacs tests are now done in dtach. This means that dtach  is now
 needed to run the notmuch test suite, at least until the checking for
-screen is improved.
+prerequisites is improved.
 
 New command-line features
 -------------------------
@@ -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)
 ========================