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diff --git a/trunk/infrastructure/ace/www/profiler.js b/trunk/infrastructure/ace/www/profiler.js
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+++ b/trunk/infrastructure/ace/www/profiler.js
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+/**
+ * Copyright 2009 Google Inc.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS-IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// author: David Greenspan
+// a basic profiler
+// e.g. var p = PROFILER("somename", true);
+//      p.mark("abc"); abc();
+//      p.mark("xyz"); var x = xyz();
+//      p.literal(x, "someNumber");
+//      p.end();
+
+// Note that IE/Win only has 16 ms time resolution for each run.
+
+var _profilersByName = {};
+function PROFILER(name, enabled) {
+  if (!_profilersByName['$'+name]) {
+    _profilersByName['$'+name] = _makeProfiler(name, enabled);
+  }
+  var p = _profilersByName['$'+name];
+  p.start();
+  return p;
+}
+
+function resetProfiler(name) {
+  delete _profilersByName['$'+name];
+}
+
+function _makeProfiler(name, enabled) {
+  enabled = (enabled !== false);
+
+  var _profileTime;
+  var _profileResults;
+  var _profileTotal;
+  var _profileHistory = [];
+  var running = false;
+
+  function profileStart(name) {
+    _profileResults = [];
+    _profileTotal = 0;
+    if (name) _profileResults.push(name);
+    running = true;
+    _profileTime = (new Date()).getTime();
+  }
+
+  function profileMark(name) {
+    var stopTime = (new Date()).getTime();
+    var dt = stopTime - _profileTime;
+    _profileResults.push(dt);
+    _profileTotal += dt;
+    if (name) _profileResults.push(name);
+    _profileTime = (new Date()).getTime();
+  }
+
+  function profileLiteral(value, name) {
+    _profileResults.push(value);
+    if (name) _profileResults.push("%="+name);
+  }
+
+  function profileEnd(name) {
+    if (running == false) return;
+    var stopTime = (new Date()).getTime();
+    var dt = stopTime - _profileTime;
+    _profileResults.push(dt);
+    _profileTotal += dt;
+    if (name) _profileResults.push(name);
+    _profileResults.unshift(_profileTotal,"=");
+    _profileHistory.push(_profileResults);
+    if (dumpProfileDataTimeout)
+      top.clearTimeout(dumpProfileDataTimeout);
+    dumpProfileDataTimeout = top.setTimeout(dumpProfileData, 800);
+    running = false;
+  }
+
+  var dumpProfileDataTimeout = null;
+
+  function dumpProfileData() {
+    var data = _profileHistory[0].slice();
+    forEach(_profileHistory.slice(1), function (h) {
+      forEach(h, function (x, i) {
+	if ((typeof x) == "number") data[i] += x;
+      });
+    });
+    data = map(data, function (x) {
+      if ((typeof x) == "number") return String(x/_profileHistory.length).substring(0,4);
+      return x;
+    });
+    data.push("("+_profileHistory.length+")");
+    top.pad.dmesg(data.join(" ").replace(/ %/g,''));
+    dumpProfileDataTimeout = null;
+  }
+
+  function noop() {}
+  function cancel() {
+    running = false;
+  }
+
+  if (enabled) {
+    return {start:profileStart, mark:profileMark, literal:profileLiteral, end:profileEnd,
+	    cancel:cancel};
+  }
+  else {
+    return {start:noop, mark:noop, literal:noop, end:noop, cancel:noop};
+  }
+}