diff --git a/js/feedlist.js b/js/feedlist.js
index c8260f367..f915bce5e 100644
--- a/js/feedlist.js
+++ b/js/feedlist.js
@@ -1,6 +1,7 @@
 var _infscroll_disable = 0;
 var _infscroll_request_sent = 0;
 var _search_query = false;
+var _viewfeed_last = 0;
 
 var counter_timeout_id = false;
 
@@ -106,6 +107,8 @@ function viewfeed(feed, method, is_cat, offset, background, infscroll_req) {
 				dijit.byId("content-tabs").getChildren()[0]);
 
 		if (!background) {
+			_viewfeed_last = get_timestamp();
+
 			if (getActiveFeedId() != feed || offset == 0) {
 				active_post_id = 0;
 				_infscroll_disable = 0;
@@ -121,8 +124,7 @@ function viewfeed(feed, method, is_cat, offset, background, infscroll_req) {
 			}
 
 			if (offset != 0 && !method) {
-				var date = new Date();
-				var timestamp = Math.round(date.getTime() / 1000);
+				var timestamp = get_timestamp();
 
 				if (_infscroll_request_sent && _infscroll_request_sent + 30 > timestamp) {
 					//console.log("infscroll request in progress, aborting");
diff --git a/js/functions.js b/js/functions.js
index b2d79dc56..578172c77 100644
--- a/js/functions.js
+++ b/js/functions.js
@@ -393,20 +393,6 @@ function getURLParam(param){
 	return String(window.location.href).parseQuery()[param];
 }
 
-function leading_zero(p) {
-	var s = String(p);
-	if (s.length == 1) s = "0" + s;
-	return s;
-}
-
-function make_timestamp() {
-	var d = new Date();
-
-  	return leading_zero(d.getHours()) + ":" + leading_zero(d.getMinutes()) +
-			":" + leading_zero(d.getSeconds());
-}
-
-
 function closeInfoBox(cleanup) {
 	try {
 		dialog = dijit.byId("infoBox");
@@ -1718,3 +1704,8 @@ function get_radio_checked(radioObj) {
 	}
 	return("");
 }
+
+function get_timestamp() {
+	var date = new Date();
+	return Math.round(date.getTime() / 1000);
+}
diff --git a/js/viewfeed.js b/js/viewfeed.js
index 92a610f8d..7c21e1085 100644
--- a/js/viewfeed.js
+++ b/js/viewfeed.js
@@ -2057,17 +2057,20 @@ function render_local_headlines(feed, is_cat, obj) {
 function precache_headlines_idle() {
 	try {
 		if (!feed_precache_timeout_id) {
-			var feeds = dijit.byId("feedTree").getVisibleUnreadFeeds();
-			var uncached = [];
+			if (get_timestamp() - _viewfeed_last > 120) {
 
-			feeds.each(function(item) {
-				if (parseInt(item[0]) > 0 && !cache_get("feed:" + item[0] + ":" + item[1]))
-					uncached.push(item);
-			});
+				var feeds = dijit.byId("feedTree").getVisibleUnreadFeeds();
+				var uncached = [];
+
+				feeds.each(function(item) {
+					if (parseInt(item[0]) > 0 && !cache_get("feed:" + item[0] + ":" + item[1]))
+						uncached.push(item);
+				});
 
-			if (uncached.length > 0) {
-				var rf = uncached[Math.floor(Math.random()*uncached.length)];
-				viewfeed(rf[0], '', rf[1], 0, true);
+				if (uncached.length > 0) {
+					var rf = uncached[Math.floor(Math.random()*uncached.length)];
+					viewfeed(rf[0], '', rf[1], 0, true);
+				}
 			}
 		}
 		precache_idle_timeout_id = setTimeout("precache_headlines_idle()", 1000*30);