diff --git a/js/background.js b/js/background.js
index c64b09a..c76256a 100644
--- a/js/background.js
+++ b/js/background.js
@@ -1,29 +1,61 @@
 
-// notify of page refreshes
+// scopes need to be cached here so that if the devtools connects,
+// the list of scopes can be immediately populated
+// TODO: clear this on refresh ?
+var scopeCache = {};
+
+var scopeCacheEmpty = function () {
+  return Object.keys(scopeCache).length;
+};
+
+// messages to be forwarded from content script to the devtools
+var toForward = [
+  'modelChange',
+  'scopeChange',
+  'watcherChange',
+  'watchPerfChange',
+  'applyPerfChange'
+];
+
 chrome.extension.onConnect.addListener(function (port) {
   port.onMessage.addListener(function (msg) {
+    // notify of page refreshes
     if (msg.action === 'register') {
-      var respond = function (tabId, changeInfo, tab) {
-        if (tabId !== msg.inspectedTabId) {
-          return;
-        }
-        port.postMessage('refresh');
-      };
-
       chrome.tabs.onUpdated.addListener(respond);
       port.onDisconnect.addListener(function () {
         chrome.tabs.onUpdated.removeListener(respond);
       });
+
+      function respond (tabId, changeInfo, tab) {
+        if (tabId === msg.inspectedTabId) {
+          port.postMessage('refresh');
+        }
+      }
     }
   });
 
   chrome.extension.onMessage.addListener(function (msg) {
-    if (msg.action === 'modelChange' ||
-        msg.action === 'scopeChange' ||
-        msg.action === 'watcherChange') {
-
+    if (toForward.indexOf(msg.action) !== -1) {
       port.postMessage(msg);
     }
   });
+
+  // immediately populate the scopes tree from the cache
+
+  // TODO: how do we know that the cache refers to the
+  // tab that we're connected to?
+  Object.keys(scopeCache).forEach(function (scopeId) {
+    port.postMessage({
+      action: 'scopeChange',
+      scope: scopeCache[scopeId],
+      scopeId: scopeId
+    });
+  });
+
 });
 
+chrome.extension.onMessage.addListener(function (msg) {
+  if (msg.action === 'scopeChange') {
+    scopeCache[msg.id] = msg.scope;
+  }
+});
\ No newline at end of file
diff --git a/js/inject/debug.js b/js/inject/debug.js
index 972e081..19a1366 100644
--- a/js/inject/debug.js
+++ b/js/inject/debug.js
@@ -145,6 +145,9 @@ var instument = function instument (window) {
     // map of scope.$ids --> $scope objects
     scopes: {},
 
+    // whether or not to emit profile data
+    profiling: false,
+
     // map of $ids --> [] array of things being watched
     modelWatchers: {},
     // map of $id + watcher --> value
@@ -257,6 +260,26 @@ var instument = function instument (window) {
       }
     }, 50),
 
+    watchPerfChange: throttle(function (str) {
+      if (debug.profiling) {
+        fireCustomEvent({
+          action: 'watchPerfChange',
+          watcher: str,
+          value: debug.watchPerf[str]
+        });
+      }
+    }, 50),
+
+    applyPerfChange: throttle(function (str) {
+      if (debug.profiling) {
+        fireCustomEvent({
+          action: 'applyPerfChange',
+          watcher: str,
+          value: debug.applyPerf[str]
+        });
+      }
+    }, 50),
+
     // might be worth limiting
     watchPerf: function () {
       throw new Error('Implement me :c');
@@ -313,6 +336,10 @@ var instument = function instument (window) {
 
   var api = window.__ngDebug = {
 
+    profiling: function (setting) {
+      debug.profiling = setting;
+    },
+
     getDeps: function () {
       return debug.deps;
     },
@@ -340,18 +367,32 @@ var instument = function instument (window) {
           ].
           forEach(function (attr) {
             var val = $elt.attr(attr),
-              className = $elt[0].className;
+              className = $elt[0].className,
+              match,
+              lhs,
+              valueIdentifier,
+              keyIdentifier;
+
             if (val) {
               name[attr] = val;
               if (attr === 'ng-repeat') {
-                var lhs = /(.+) in/.exec(val);
-                lhs = lhs[1];
-                name.lhs = lhs + summarizeObject(scope[lhs]);
+                match = /(.+) in/.exec(val);
+                lhs = match[1];
+
+                match = lhs.match(/^(?:([\$\w]+)|\(([\$\w]+)\s*,\s*([\$\w]+)\))$/);
+                valueIdentifier = match[3] || match[1];
+                keyIdentifier = match[2];
+
+                if (keyIdentifier) {
+                  name.lhs = valueIdentifier + '["' + scope[keyIdentifier] + '"]' + summarizeObject(scope[valueIdentifier]);
+                } else {
+                  name.lhs = valueIdentifier + summarizeObject(scope[valueIdentifier]);
+                }
+
               }
             } else if (className.indexOf(attr) !== -1) {
-              val = (new RegExp(attr + ': ([a-zA-Z0-9]+);')).exec(className);
-              val = val[1];
-              name[attr] = val;
+              match = (new RegExp(attr + ': ([a-zA-Z0-9]+);')).exec(className);
+              name[attr] = match[1];
             }
           });
 
@@ -430,6 +471,9 @@ var instument = function instument (window) {
     watchModel: function (id, path) {
       debug.modelWatchers[id] = debug.modelWatchers[id] || {};
       debug.modelWatchers[id][path || ''] = true;
+      if (!path || path === '') {
+        debug.modelWatchersState = {};
+      }
       emit.modelChange(id);
       emit.watcherChange(id);
     },
@@ -895,6 +939,7 @@ var instument = function instument (window) {
             var end = performance.now();
             debug.watchPerf[watchStr].time += (end - start);
             debug.watchPerf[watchStr].calls += 1;
+            emit.watchPerfChange(watchStr);
             return ret;
           };
         } else {
@@ -904,6 +949,7 @@ var instument = function instument (window) {
             var end = performance.now();
             debug.watchPerf[watchStr].time += (end - start);
             debug.watchPerf[watchStr].calls += 1;
+            emit.watchPerfChange(watchStr);
             return ret;
           };
         }
@@ -927,6 +973,7 @@ var instument = function instument (window) {
             }
             debug.applyPerf[applyStr].time += (end - start);
             debug.applyPerf[applyStr].calls += 1;
+            emit.applyPerfChange(applyStr);
             return ret;
           };
         }
diff --git a/js/services/appContext.js b/js/services/appContext.js
index a34e7ea..fac443a 100644
--- a/js/services/appContext.js
+++ b/js/services/appContext.js
@@ -31,12 +31,6 @@ angular.module('panelApp').factory('appContext', function (chromeExtension, $roo
       "}", args, cb);
     },
 
-    refresh: function (cb) {
-      chromeExtension.eval(function (window) {
-        window.document.location.reload();
-      }, cb);
-    },
-
     inspect: function (scopeId) {
       this.executeOnScope(scopeId, function (scope, elt) {
         inspect(elt);
@@ -49,9 +43,12 @@ angular.module('panelApp').factory('appContext', function (chromeExtension, $roo
     // takes a bool
     setDebug: function (setting) {
       if (setting) {
+        // prevent a refresh if debugging is already enabled
         chromeExtension.eval(function (window) {
-          window.document.cookie = '__ngDebug=true;';
-          window.document.location.reload();
+          if (document.cookie.indexOf('__ngDebug=true') === -1) {
+            window.document.cookie = '__ngDebug=true;';
+            window.document.location.reload();
+          }
         });
       } else {
         chromeExtension.eval(function (window) {
diff --git a/js/services/appModel.js b/js/services/appModel.js
index e5ebc24..488de14 100644
--- a/js/services/appModel.js
+++ b/js/services/appModel.js
@@ -5,9 +5,7 @@ angular.module('panelApp').factory('appModel', function (chromeExtension, appCon
     _scopeCache = {},
     _rootScopeCache = [];
 
-
-  // clear cache on page refresh
-  appContext.watchRefresh(function () {
+  appContext.watchRefresh(function clearCaches () {
     _scopeCache = {};
     _scopeTreeCache = {};
     _rootScopeCache = [];