add a 'refresh' button to the performance tab of the admin panel

www/admin/inner.js

@@ -66,6 +66,7 @@ define([
             'cp-admin-support-init'
         ],
         'performance': [
+            'cp-admin-refresh-performance',
             'cp-admin-performance-profiling',
         ]
     };
@@ -931,9 +932,22 @@ define([
         return;
     };
 
+    var onRefreshPerformance = Util.mkEvent();
+
+    create['refresh-performance'] = function () {
+        var key = 'refresh-performance';
+        var btn = h('button.btn.btn-primary', Messages.oo_refresh);
+        var div = h('div.cp-admin-' + key + '.cp-sidebarlayout-element', btn);
+        $(btn).click(function () {
+            onRefreshPerformance.fire();
+        });
+        return $(div);
+    };
+
     create['performance-profiling'] = function () {
         var $div = makeBlock('performance-profiling');
 
+        var onRefresh = function () {
             var body = h('tbody');
 
             var table = h('table#cp-performance-table', [
@@ -944,16 +958,12 @@ define([
                 ]),
                 body,
             ]);
-
-        $div.append(table);
-
             var appendRow = function (key, time, percent) {
                 console.log("[%s] %ss running time (%s%)", key, time, percent);
                 body.appendChild(h('tr', [ key, time, percent ].map(function (x) {
                     return h('td', x);
                 })));
             };
-
             var process = function (_o) {
                 var o = _o[0];
                 var sorted = Object.keys(o).sort(function (a, b) {
@@ -973,8 +983,16 @@ define([
             }, function (e, data) {
                 if (e) { return void console.error(e); }
                 //console.info(data);
+                $div.find("table").remove();
+
+
                 process(data);
+                $div.append(table);
             });
+        };
+
+        onRefresh();
+        onRefreshPerformance.reg(onRefresh);
 
         return $div;
     };