From 858a808fb8d4b6beac415e1273ebcbaaa46fd1d0 Mon Sep 17 00:00:00 2001
From: Malte Ubl <malte.ubl@gmail.com>
Date: Tue, 15 Feb 2011 20:52:45 +0100
Subject: [PATCH] Optimization: Don't draw while the user scrolls

---
 public/lib/stream/initplugins.js | 9 ++++++++-
 public/lib/stream/status.js      | 3 +++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/public/lib/stream/initplugins.js b/public/lib/stream/initplugins.js
index 19bd8c6..8c7f16a 100644
--- a/public/lib/stream/initplugins.js
+++ b/public/lib/stream/initplugins.js
@@ -49,9 +49,16 @@ require.def("stream/initplugins",
           win.bind("hashchange", change); // who cares about old browsers?
           change();
           
+          var scrollTimer;
+          function scrollTimeout() {
+            window.Streamie_Just_Scrolled = false;
+          }
           win.bind("scroll", function () {
             plugin.ScrollState[location.hash.replace(/^\#/, "") || "all"] = win.scrollTop();
-          })
+            window.Streamie_Just_Scrolled = true;
+            clearTimeout(scrollTimer);
+            scrollTimer = setTimeout(scrollTimeout, 1000);
+          });
         }
       },
       
diff --git a/public/lib/stream/status.js b/public/lib/stream/status.js
index 66613b6..005aa55 100644
--- a/public/lib/stream/status.js
+++ b/public/lib/stream/status.js
@@ -470,6 +470,9 @@ require.def("stream/status",
       age: {
         func: function age (tweet) {
           function update() {
+            if(window.Streamie_Just_Scrolled) { // never draw while scrolling
+              return;
+            }
             $('#stream').children().each(function() {
               var tweet = $(this).data('tweet');