chromium/third_party/blink/perf_tests/layout/grid-nested-baseline.html

<!DOCTYPE html>
<script src="../resources/runner.js"></script>
<style>
  .grid {
    display: grid;
    align-items: baseline;
  }
</style>
<div class="grid">
  <div class="grid">
    <div class="grid">
      <div class="grid">
        <div class="grid">
          <div class="grid">
              <div id="target"></div>
          </div>
        </div>
      </div>
    </div>
  </div>
</div>
<script>
PerfTestRunner.measureRunsPerSecond({
    description: 'Layout of nested grid with baseline alignment.',
    run: () => {
      document.getElementById('target').innerText = 'Some text here.';
      PerfTestRunner.forceLayout();
      document.getElementById('target').innerText = '';
      PerfTestRunner.forceLayout();
    },
});
</script>