diff --git a/src/static/js/revisioncache.js b/src/static/js/revisioncache.js
index 1a18d28cb..f5dc5a383 100644
--- a/src/static/js/revisioncache.js
+++ b/src/static/js/revisioncache.js
@@ -23,7 +23,7 @@
 // of the document.  These revisions are connected together by various
 // changesets,  or deltas, between any two revisions.
 
-require('./jquery.class');
+//require('./jquery.class');
 
 $.Class("Changeset",
   {//statics
@@ -144,7 +144,7 @@ $.Class("RevisionCache",
           // which is closer to our target, so we should push that changeset to
           // the list and move to that new revision to continue building a path
           var delta_rev = this.getRevision(current_rev.revnum + current_changeset.deltarev);
-          if (delta_rev.lt(to_rev, is_reverse) {
+          if (delta_rev.lt(to_rev, is_reverse)) {
             changesets.push(current_changeset);
             current_rev = delta_rev;
             break;
@@ -153,7 +153,6 @@ $.Class("RevisionCache",
         if (stop || current_rev == old_rev)
           break;
       }
-
       var status = 'partial';
       if (current_rev == to_rev)
         status = 'complete';
@@ -163,66 +162,6 @@ $.Class("RevisionCache",
         'rev': current_rev.rev,
         'status': status,
         'changesets': changesets,
-        /*'spans': spans,
-        'times': times
-        */
-      };
-    },
-    findPath: function (from, to) {
-      var current_rev = this.getRevision(from);
-      var to_rev = this.getRevision(to);
-      var is_reverse = !(from < to);
-      var changesets = [];
-
-      if (from == to) {
-        //TODO: implement short-circuit
-      }
-
-      if (!current_rev.changesets.length) {
-        // You cannot build a path if the starting revision hasn't
-        // got any changesets
-        //TODO: implement short-circuit
-      }
-
-      while (current_rev.lt(to_rev)) {
-        for (var i = 0; i < current_rev.changesets.length; i++) {
-          // we might get stuck on a particular revision if only a
-          // partial path is available.
-          old_rev = current_rev;
-          // the next (first) changeset in the current revision has a delta
-          // in the opposite direction to that in which we are trying to
-          // move, and so cannot help us. Because the changeset list is
-          // sorted, we can just stop here.
-          if (current_rev.changesets[i].deltarev < 0) {
-            // When can this happen?
-            stop = true;
-          }
-
-          // the current revision has a changeset which helps us get to a revision
-          // which is closer to our target, so we should push that changeset to
-          // the list and move to that new revision to continue building a path
-          if (current_rev.revnum + current_rev.changesets[i].deltarev <= to) {
-            changesets.push(current_rev.changesets[i]);
-            current_rev = this.getRevision(current_rev.rev + current_rev.changesets[i].deltarev);
-            break;
-          }
-        }
-        if (stop || current_rev == old_rev)
-          break;
-      }
-
-      var status = 'partial';
-      if (current_rev == to_rev)
-        status = 'complete';
-
-      return {
-        'fromRev': from,
-        'rev': current_rev.rev,
-        'status': status,
-        'changesets': changesets,
-        /*'spans': spans,
-        'times': times
-        */
       };
     },
     addChangeset: function (from, to, value, reverseValue, timedelta) {
@@ -233,12 +172,96 @@ $.Class("RevisionCache",
     }
   }
 );
+
+$.Class("Thread",
+  {//statics
+  },
+  {//instance
+    init: function () {
+      this.is_running = false;
+      this.is_stopping = false;
+      this._interval_id = null;
+    },
+    _run: function () {
+      console.log("[thread] tick");
+    },
+    // start the run loop
+    start: function () {
+      var _this = this;
+      console.log("[thread] starting")
+      var wrapper = function () {
+        if (_this.is_running && _this.is_stopping) {
+          console.log("[thread] shutting down")
+          clearInterval(_this._interval_id);
+          _this.is_running = false;
+          return;
+        }
+        _this._run.apply(_this);
+      };
+      this._interval_id = setInterval(wrapper, 1000);
+      this.is_running = true;
+    },
+    // stop the run loop
+    stop: function () {
+      this.is_stopping = true;
+      console.log("[thread] request stop")
+      // TODO: consider finding a way to make this block
+      // or alternatively, having a callback which is called
+      // when the thread stops
+    }
+  }
+);
+
+$.Class("ChangesetRequest",
+  {//statics
+  },
+  {//instance
+    init: function (start, end) {
+      this.start = start;
+      this.end = end;
+    }
+  }
+);
+
+Thread("ChangesetLoader",
+  {//statics
+  },
+  {//instance
+    init: function () {
+      this._super();
+      this.queue_large = [];
+      this.queue_medium = [];
+      this.queue_small = [];
+    },
+    enqueue: function (start, count) {
+      //TODO: check cache to see if we really need to fetch this
+      //      maybe even to splices if we just need a smaller range
+      //      in the middle
+      var queue = null;
+      if (count >= 100)
+        queue = this.queue_large;
+      else if (count >= 10)
+        queue = this.queue_medium;
+      else
+        queue = this.queue_small;
+
+      queue.push(new ChangesetRequest(start, start+count));
+    },
+    _run: function () {
+      console.log("[changesetloader] tick");
+      //TODO: pop an item from the queue and perform a request.
+
+    },
+  }
+);
 function loadBroadcastRevisionsJS(clientVars)
 {
 
+      console.log("here")
   revisionCache = new RevisionCache(clientVars.collab_client_vars.rev || 0);
   revisionInfo.latest = clientVars.collab_client_vars.rev || -1;
 
+//  cl = new ChangesetLoader();
 
 }