diff --git a/vendor/backbone/backbone.js b/vendor/backbone/backbone.js
index a307e09ff..f401b08cf 100644
--- a/vendor/backbone/backbone.js
+++ b/vendor/backbone/backbone.js
@@ -134,6 +134,9 @@
 
       rest = [];
       events = events.split(eventSplitter);
+
+      // Fill up `rest` with the callback arguments.  Since we're only copying
+      // the tail of `arguments`, a loop is much faster than Array#slice.
       for (i = 1, length = arguments.length; i < length; i++) {
         rest[i - 1] = arguments[i];
       }
@@ -1023,6 +1026,9 @@
       var docMode           = document.documentMode;
       var oldIE             = (isExplorer.exec(navigator.userAgent.toLowerCase()) && (!docMode || docMode <= 7));
 
+      // Normalize root to always include trailing slash
+      if (!trailingSlash.test(this.options.root)) this.options.root += '/';
+
       if (oldIE && this._wantsHashChange) {
         this.iframe = Backbone.$('<iframe src="javascript:0" tabindex="-1" />').hide().appendTo('body')[0].contentWindow;
         this.navigate(fragment);
@@ -1042,7 +1048,7 @@
       // opened by a non-pushState browser.
       this.fragment = fragment;
       var loc = this.location;
-      var atRoot  = (loc.pathname === this.options.root) && !loc.search;
+      var atRoot = (loc.pathname.replace(/[^/]$/, '$&/') === this.options.root) && !loc.search;
 
       // If we've started off with a route from a `pushState`-enabled browser,
       // but we're currently in a browser that doesn't support it...
diff --git a/vendor/backbone/test/router.js b/vendor/backbone/test/router.js
index a4b5b4405..701a1f07a 100644
--- a/vendor/backbone/test/router.js
+++ b/vendor/backbone/test/router.js
@@ -20,9 +20,11 @@ $(document).ready(function() {
       _.extend(this, _.pick($('<a></a>', {href: href})[0],
         'href',
         'hash',
+        'host',
         'search',
         'fragment',
-        'pathname'
+        'pathname',
+        'protocol'
       ));
       // In IE, anchor.pathname does not contain a leading slash though
       // window.location.pathname does.
@@ -318,4 +320,52 @@ $(document).ready(function() {
     strictEqual(Backbone.history.fragment, 'x');
   });
 
+  test("Router: Normalize root.", 1, function() {
+    Backbone.history.stop();
+    location.replace('http://example.com/root');
+    Backbone.history = new Backbone.History({
+      location: location,
+      history: {
+        pushState: function(state, title, url) {
+          strictEqual(url, '/root/fragment');
+        }
+      }
+    });
+    Backbone.history.start({
+      pushState: true,
+      root: '/root',
+      hashChange: false
+    });
+    Backbone.history.navigate('fragment');
+  });
+
+  test("Router: Normalize root.", 1, function() {
+    Backbone.history.stop();
+    location.replace('http://example.com/root#fragment');
+    Backbone.history = new Backbone.History({
+      location: location,
+      history: {
+        pushState: function(state, title, url) {},
+        replaceState: function(state, title, url) {
+          strictEqual(url, 'http://example.com/root/fragment');
+        }
+      }
+    });
+    Backbone.history.start({
+      pushState: true,
+      root: '/root'
+    });
+  });
+
+  test("Router: Normalize root.", 1, function() {
+    Backbone.history.stop();
+    location.replace('http://example.com/root');
+    Backbone.history = new Backbone.History({location: location});
+    Backbone.history.loadUrl = function() { ok(true); };
+    Backbone.history.start({
+      pushState: true,
+      root: '/root'
+    });
+  });
+
 });
diff --git a/vendor/benchmark.js/benchmark.js b/vendor/benchmark.js/benchmark.js
index 7d2ec9ff9..c46a54c00 100644
--- a/vendor/benchmark.js/benchmark.js
+++ b/vendor/benchmark.js/benchmark.js
@@ -2410,8 +2410,7 @@
         'teardown': getSource(bench.teardown, preprocess('m$.teardown()'))
       };
 
-      var compiled = bench.compiled,
-          count = bench.count = clone.count,
+      var count = bench.count = clone.count,
           decompilable = support.decompilation || stringable,
           id = bench.id,
           isEmpty = !(source.fn || stringable),
@@ -2433,77 +2432,77 @@
         }
       }
 
-      if (!compiled) {
-        // compile in setup/teardown functions and the test loop
-        compiled = bench.compiled = createFunction(preprocess('t$'), interpolate(
-          preprocess(deferred
-            ? 'var d$=this,#{fnArg}=d$,m$=d$.benchmark._original,f$=m$.fn,su$=m$.setup,td$=m$.teardown;' +
-              // when `deferred.cycles` is `0` then...
-              'if(!d$.cycles){' +
-              // set `deferred.fn`
-              'd$.fn=function(){var #{fnArg}=d$;if(typeof f$=="function"){try{#{fn}\n}catch(e$){f$(d$)}}else{#{fn}\n}};' +
-              // set `deferred.teardown`
-              'd$.teardown=function(){d$.cycles=0;if(typeof td$=="function"){try{#{teardown}\n}catch(e$){td$()}}else{#{teardown}\n}};' +
-              // execute the benchmark's `setup`
-              'if(typeof su$=="function"){try{#{setup}\n}catch(e$){su$()}}else{#{setup}\n};' +
-              // start timer
-              't$.start(d$);' +
-              // execute `deferred.fn` and return a dummy object
-              '}d$.fn();return{}'
+      // Compile in setup/teardown functions and the test loop.
+      // Create a new compiled test, instead of using the cached `bench.compiled`,
+      // to avoid potential engine optimizations enabled over the life of the test.
+      var compiled = bench.compiled = createFunction(preprocess('t$'), interpolate(
+        preprocess(deferred
+          ? 'var d$=this,#{fnArg}=d$,m$=d$.benchmark._original,f$=m$.fn,su$=m$.setup,td$=m$.teardown;' +
+            // when `deferred.cycles` is `0` then...
+            'if(!d$.cycles){' +
+            // set `deferred.fn`
+            'd$.fn=function(){var #{fnArg}=d$;if(typeof f$=="function"){try{#{fn}\n}catch(e$){f$(d$)}}else{#{fn}\n}};' +
+            // set `deferred.teardown`
+            'd$.teardown=function(){d$.cycles=0;if(typeof td$=="function"){try{#{teardown}\n}catch(e$){td$()}}else{#{teardown}\n}};' +
+            // execute the benchmark's `setup`
+            'if(typeof su$=="function"){try{#{setup}\n}catch(e$){su$()}}else{#{setup}\n};' +
+            // start timer
+            't$.start(d$);' +
+            // execute `deferred.fn` and return a dummy object
+            '}d$.fn();return{}'
 
-            : 'var r$,s$,m$=this,f$=m$.fn,i$=m$.count,n$=t$.ns;#{setup}\n#{begin};' +
-              'while(i$--){#{fn}\n}#{end};#{teardown}\nreturn{elapsed:r$,uid:"#{uid}"}'),
+          : 'var r$,s$,m$=this,f$=m$.fn,i$=m$.count,n$=t$.ns;#{setup}\n#{begin};' +
+            'while(i$--){#{fn}\n}#{end};#{teardown}\nreturn{elapsed:r$,uid:"#{uid}"}'),
+        source
+      ));
+
+      try {
+        if (isEmpty) {
+          // Firefox may remove dead code from Function#toString results
+          // http://bugzil.la/536085
+          throw new Error('The test "' + name + '" is empty. This may be the result of dead code removal.');
+        }
+        else if (!deferred) {
+          // pretest to determine if compiled code is exits early, usually by a
+          // rogue `return` statement, by checking for a return object with the uid
+          bench.count = 1;
+          compiled = (compiled.call(bench, timer) || {}).uid == uid && compiled;
+          bench.count = count;
+        }
+      } catch(e) {
+        compiled = null;
+        clone.error = e || new Error(String(e));
+        bench.count = count;
+      }
+      // fallback when a test exits early or errors during pretest
+      if (decompilable && !compiled && !deferred && !isEmpty) {
+        compiled = createFunction(preprocess('t$'), interpolate(
+          preprocess(
+            (clone.error && !stringable
+              ? 'var r$,s$,m$=this,f$=m$.fn,i$=m$.count'
+              : 'function f$(){#{fn}\n}var r$,s$,m$=this,i$=m$.count'
+            ) +
+            ',n$=t$.ns;#{setup}\n#{begin};m$.f$=f$;while(i$--){m$.f$()}#{end};' +
+            'delete m$.f$;#{teardown}\nreturn{elapsed:r$}'
+          ),
           source
         ));
 
         try {
-          if (isEmpty) {
-            // Firefox may remove dead code from Function#toString results
-            // http://bugzil.la/536085
-            throw new Error('The test "' + name + '" is empty. This may be the result of dead code removal.');
-          }
-          else if (!deferred) {
-            // pretest to determine if compiled code is exits early, usually by a
-            // rogue `return` statement, by checking for a return object with the uid
-            bench.count = 1;
-            compiled = (compiled.call(bench, timer) || {}).uid == uid && compiled;
-            bench.count = count;
-          }
-        } catch(e) {
-          compiled = null;
-          clone.error = e || new Error(String(e));
+          // pretest one more time to check for errors
+          bench.count = 1;
+          compiled.call(bench, timer);
+          bench.compiled = compiled;
           bench.count = count;
+          delete clone.error;
         }
-        // fallback when a test exits early or errors during pretest
-        if (decompilable && !compiled && !deferred && !isEmpty) {
-          compiled = createFunction(preprocess('t$'), interpolate(
-            preprocess(
-              (clone.error && !stringable
-                ? 'var r$,s$,m$=this,f$=m$.fn,i$=m$.count'
-                : 'function f$(){#{fn}\n}var r$,s$,m$=this,i$=m$.count'
-              ) +
-              ',n$=t$.ns;#{setup}\n#{begin};m$.f$=f$;while(i$--){m$.f$()}#{end};' +
-              'delete m$.f$;#{teardown}\nreturn{elapsed:r$}'
-            ),
-            source
-          ));
-
-          try {
-            // pretest one more time to check for errors
-            bench.count = 1;
-            compiled.call(bench, timer);
+        catch(e) {
+          bench.count = count;
+          if (clone.error) {
+            compiled = null;
+          } else {
             bench.compiled = compiled;
-            bench.count = count;
-            delete clone.error;
-          }
-          catch(e) {
-            bench.count = count;
-            if (clone.error) {
-              compiled = null;
-            } else {
-              bench.compiled = compiled;
-              clone.error = e || new Error(String(e));
-            }
+            clone.error = e || new Error(String(e));
           }
         }
       }