From f14de4784bbc5030ed20dfc78c0a8f2f6aa16241 Mon Sep 17 00:00:00 2001
From: "Dirk-Jan C. Binnema" <djcb@djcbsoftware.nl>
Date: Fri, 3 Jun 2011 08:22:56 +0300
Subject: [PATCH] * mu-msg-iter.cc: pre-fetch documents in an mset, makes
 search slightly faster

---
 src/mu-msg-iter.cc | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/mu-msg-iter.cc b/src/mu-msg-iter.cc
index a60d31ad..c036eef9 100644
--- a/src/mu-msg-iter.cc
+++ b/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 {
@@ -36,6 +40,11 @@ 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);