Introduce blink/perf_tests/paint/select-all-words.html

This patch introduces a performance test file "select-all-words.html" for measuring painting selection. See https://bit.ly/2SyNQS1 for profiling sample comparing legacy layout and LayoutNG. As of February 7, 2019, LayoutNG is two times slower than legacy layout. Change-Id: I8c5fe8418715b7d0078f6f1186c4191a1fb7d850 Reviewed-on: https://chromium-review.googlesource.com/c/1457701 Auto-Submit: Yoshifumi Inoue <yosin@chromium.org> Reviewed-by: Koji Ishii <kojii@chromium.org> Commit-Queue: Koji Ishii <kojii@chromium.org> Cr-Commit-Position: refs/heads/master@{#629909}

Introduce blink/perf_tests/paint/select-all-words.html
This patch introduces a performance test file "select-all-words.html" for measuring painting selection. See https://bit.ly/2SyNQS1 for profiling sample comparing legacy layout and LayoutNG. As of February 7, 2019, LayoutNG is two times slower than legacy layout. Change-Id: I8c5fe8418715b7d0078f6f1186c4191a1fb7d850 Reviewed-on: https://chromium-review.googlesource.com/c/1457701 Auto-Submit: Yoshifumi Inoue <yosin@chromium.org> Reviewed-by: Koji Ishii <kojii@chromium.org> Commit-Queue: Koji Ishii <kojii@chromium.org> Cr-Commit-Position: refs/heads/master@{#629909}
24b07838 · Yoshifumi Inoue · Commit Bot · 7e25dff4 · 24b07838
Commit 24b07838 authored Feb 07, 2019 by Yoshifumi Inoue Committed by Commit Bot Feb 07, 2019
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third_party/blink/perf_tests/paint/select-all-words.html third_party/blink/perf_tests/paint/select-all-words.html +60 -0

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--- a/third_party/blink/perf_tests/paint/select-all-words.html
+++ b/third_party/blink/perf_tests/paint/select-all-words.html
+<!doctype html>
+<body>
+<script src="../resources/runner.js"></script>
+<script src="../layout/resources/line-layout-perf-test.js"></script>
+<div id="container"></div>
+<script>
+const kNumberOfWords = 10000 * 30;
+const kCount = 10;
+const container = document.getElementById('container');
+const selection = window.getSelection();
+
+container.textContent = (() => {
+  const words = [];
+  for (let i = 0; i < kNumberOfWords; ++i)
+    words.push(TextGenerator.createWord(i % 12 + 3));
+  return words.join(' ');
+})();
+
+let isDone = false;
+let startTime = 0;
+let counter = 0;
+
+function runTest() {
+  if (startTime !== 0 && counter % kCount === 0) {
+    PerfTestRunner.measureValueAsync(PerfTestRunner.now() - startTime);
+    PerfTestRunner.addRunTestEndMarker(); // For tracing metrics
+  }
+  if (isDone)
+    return;
+  window.requestAnimationFrame(() => {
+    if (counter % kCount === 0) {
+      PerfTestRunner.addRunTestStartMarker();
+      startTime = PerfTestRunner.now();  // For tracing metrics
+    }
+    selection.collapse(container, 0);
+    if (counter % 2 === 1)
+      selection.extend(container, 1);
+    ++counter;
+    runTest();
+  });
+}
+
+
+PerfTestRunner.startMeasureValuesAsync({
+  unit: 'ms',
+  run: function() {
+    runTest();
+  },
+  done: function() {
+    container.textContent = '';
+    isDone = true;
+  },
+  iterationCount: 10,
+  tracingCategories: 'blink',
+  traceEventsToMeasure: [
+    'LocalFrameView::RunPrePaintLifecyclePhase',
+    'LocalFrameView::RunPaintLifecyclePhase'
+  ],
+});
+</script>