* mu-msg-iter.cc: pre-fetch documents in an mset, makes search slightly faster

src/mu-msg-iter.cc

@@ -28,6 +28,10 @@
 #include "mu-msg.h"
 #include "mu-msg-iter.h"
 
+/* just a guess... */
+#define MAX_FETCH_SIZE 10000
+
+
 static gboolean update_msg (MuMsgIter *iter);
 
 struct _MuMsgIter {
@@ -37,6 +41,11 @@ struct _MuMsgIter {
 		_matches = _enq.get_mset (0, maxnum);
 		_cursor	 = _matches.begin();
 
+		/* this seems to make search slightly faster, some
+		 * non-scientific testing suggests. 5-10% or so */ 
+		if (_matches.size() <= MAX_FETCH_SIZE)
+			_matches.fetch ();
+		
 		if (!_matches.empty())
 			update_msg (this);
 	}