optimize infinite scroll widget instantiation. don't instantiate timeago...

optimize infinite scroll widget instantiation. don't instantiate timeago widgets for StreamElement and Comment widgets

public/javascripts/widgets/comment.js

@@ -5,8 +5,7 @@
     this.subscribe("widget/ready", function(evt, comment) {
       $.extend(self, {
         comment: comment,
-        deleteCommentLink: comment.find(".comment_delete"),
-        timeAgo: self.instantiate("TimeAgo", comment.find("abbr.timeago"))
+        deleteCommentLink: comment.find(".comment_delete")
       });
 
       self.deleteCommentLink.click(self.removeComment);

public/javascripts/widgets/stream-element.js

@@ -10,13 +10,13 @@
         commentStream: self.instantiate("CommentStream", element.find("ul.comments")),
         embedder: self.instantiate("Embedder", element.find("div.content")),
         likes: self.instantiate("Likes", element.find("div.likes_container")),
-        lightBox: self.instantiate("Lightbox", element),
-        timeAgo: self.instantiate("TimeAgo", element.find("abbr.timeago"))
+        lightBox: self.instantiate("Lightbox", element)
       });
 
       self.globalSubscribe("post/" + self.postGuid + "/comment/added", function(evt, comment) {
         self.commentStream.publish("comment/added", comment);
       });
+
       self.globalSubscribe("commentStream/" + self.postGuid + "/loaded", function(evt) {
         self.commentStream.instantiateCommentWidgets();
       });

public/javascripts/widgets/stream.js

 (function() {
   var Stream = function() {
     var self = this;
+    this.streamElements = {};
+
 
     this.subscribe("widget/ready", function(evt, stream) {
       $.extend(self, {
-        stream: $(stream),
-        streamElements: {}
+        stream: $(stream)
       });
 
       $.each(self.stream.find(".stream_element"), function() {
-        self.addPost($(this));
+        var post = $(this);
+        if(typeof self.streamElements[post.attr("id")] === "undefined") {
+          self.addPost(post);
+        }
       });
     });