1 files changed, 120 insertions, 0 deletions
diff --git a/tools/page_cycler/database/head.js b/tools/page_cycler/database/head.js
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+// Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+var totalTime;
+var fudgeTime;
+var elapsedTime;
+var endTime;
+var iterations;
+var cycle;
+var results = false;
+var TIMEOUT = 15;
+
+/**
+ * Returns the value of the given property stored in the cookie.
+ * @param {string} name The property name.
+ * @return {string} The value of the given property, or empty string
+ *     if the property was not found.
+ */
+function getPropertyValue(name) {
+  var cookies = document.cookie.split('; ');
+  for (var i = 0; i < cookies.length; ++i) {
+    var t = cookies[i].split('=');
+    if ((t[0] == name) && t[1])
+      return t[1];
+  }
+  return '';
+}
+
+/**
+ * Returns the value of the '__pc_timings' property.
+ * @return {string} The list of all timings we got so far.
+ */
+function getTimings() {
+  return getPropertyValue('__pc_timings');
+}
+
+/**
+ * Sets the value of the '__pc_timings' property in the cookie.
+ * @param {string} timings A comma-separated list of timings.
+ */
+function setTimings(timings) {
+  document.cookie = '__pc_timings=' + timings + '; path=/';
+}
+
+/**
+ * Starts the next test cycle or redirects the browser to the results page.
+ */
+function nextCycleOrResults() {
+  // Call GC twice to cleanup JS heap before starting a new test.
+  if (window.gc) {
+    window.gc();
+    window.gc();
+  }
+
+  var tLag = Date.now() - endTime - TIMEOUT;
+  if (tLag > 0)
+    fudgeTime += tLag;
+
+  var doc;
+  if (cycle == iterations) {
+    document.cookie = '__pc_done=1; path=/';
+    doc = '../../common/report.html';
+  } else {
+    doc = 'index.html';
+  }
+
+  var timings = elapsedTime;
+  var oldTimings = getTimings();
+  if (oldTimings != '')
+    timings = oldTimings + ',' + timings;
+  setTimings(timings);
+
+  var url = doc + '?n=' + iterations + '&i=' + cycle +
+      '&td=' + totalTime + '&tf=' + fudgeTime;
+  document.location.href = url;
+}
+
+/**
+ * Computes various running times and updates the stats reported at the end.
+ * @param {!number} cycleTime The running time of the test cycle.
+ */
+function testComplete(cycleTime) {
+  if (results)
+    return;
+
+  var oldTotalTime = 0;
+  var cycleEndTime = Date.now();
+  var cycleFudgeTime = 0;
+
+  var s = document.location.search;
+  if (s) {
+    var params = s.substring(1).split('&');
+    for (var i = 0; i < params.length; i++) {
+      var f = params[i].split('=');
+      switch (f[0]) {
+        case 'skip':
+          return;  // No calculation, just viewing
+        case 'n':
+          iterations = f[1];
+          break;
+        case 'i':
+          cycle = f[1] - 0 + 1;
+          break;
+        case 'td':
+          oldTotalTime = f[1] - 0;
+          break;
+        case 'tf':
+          cycleFudgeTime = f[1] - 0;
+          break;
+      }
+    }
+  }
+  elapsedTime = cycleTime;
+  totalTime = oldTotalTime + elapsedTime;
+  endTime = cycleEndTime;
+  fudgeTime = cycleFudgeTime;
+
+  setTimeout(nextCycleOrResults, TIMEOUT);
+}