1 files changed, 97 insertions, 0 deletions
diff --git a/testing/talos/talos/tests/perf-reftest/util.js b/testing/talos/talos/tests/perf-reftest/util.js
new file mode 100644
index 0000000000..f5b803eaa6
--- /dev/null
+++ b/testing/talos/talos/tests/perf-reftest/util.js
@@ -0,0 +1,97 @@
+var perf_data = {
+  start: null,
+  end: null,
+};
+
+function build_dom(n, elemName, options) {
+  // By default we use different elements in the DOM to defeat the style sharing
+  // cache, otherwise this sythetic DOM is trivially stylable by engines with that
+  // optimization.
+  options = options || {};
+  var elemNameLeft = options.elemNameLeft || "div";
+  var elemNameRight = options.elemNameRight || "span";
+
+  var ours = document.createElement(elemName);
+  for (var attr in options.attributes) {
+    ours.setAttribute(attr, options.attributes[attr]);
+  }
+
+  if (n != 1) {
+    var leftSize = Math.floor(n / 2);
+    var rightSize = Math.floor((n - 1) / 2);
+    ours.appendChild(build_dom(leftSize, elemNameLeft, options));
+    if (rightSize > 0) {
+      ours.appendChild(build_dom(rightSize, elemNameRight, options));
+    }
+  }
+  return ours;
+}
+
+function build_rule(selector, selectorRepeat, declaration, ruleRepeat) {
+  ruleRepeat = ruleRepeat || 1;
+  var s = document.createElement("style");
+  var rule = Array(selectorRepeat).fill(selector).join(", ") + declaration;
+  s.textContent = Array(ruleRepeat).fill(rule).join("\n\n");
+  return s;
+}
+
+function build_text(word, wordRepeat, paraRepeat) {
+  wordRepeat = wordRepeat || 1;
+  paraRepeat = paraRepeat || 1;
+  let para = Array(wordRepeat).fill(word).join(" ");
+  return Array(paraRepeat).fill(para).join("\n");
+}
+
+function flush_style(element) {
+  getComputedStyle(element || document.documentElement).color;
+}
+
+function flush_layout(element) {
+  (element || document.documentElement).offsetHeight;
+}
+
+function perf_start() {
+  if (perf_data.start !== null) {
+    throw new Error("already started timing!");
+  }
+
+  perf_data.start = performance.now();
+}
+
+function perf_finish() {
+  var end = performance.now();
+
+  if (perf_data.start === null) {
+    throw new Error("haven't started timing!");
+  }
+
+  if (perf_data.end !== null) {
+    throw new Error("already finished timing!");
+  }
+
+  var start = perf_data.start;
+  perf_data.end = end;
+
+  // when running in talos report results; when running outside talos just alert
+  if (window.tpRecordTime) {
+    // Running in talos.
+    window.tpRecordTime(end - start, start);
+  } else if (window.parent && window.parent.report_perf_reftest_time) {
+    // Running in the perf-reftest runner.
+    window.parent.report_perf_reftest_time({
+      type: "time",
+      value: end - start,
+    });
+  } else {
+    // Running standalone; just alert.
+    console.log(end);
+    console.log(start);
+    alert("Result: " + (end - start).toFixed(2) + " (ms)");
+  }
+}
+
+if (window.parent.report_perf_reftest_time) {
+  window.addEventListener("error", function (e) {
+    window.parent.report_perf_reftest_time({ type: "error", value: e.message });
+  });
+}