chromium/third_party/blink/perf_tests/base64/atob-whitespace.html

<!DOCTYPE html>
<html>
<body>
<script src="../resources/runner.js"></script>
<script>
var longStr = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ ";
for (var i = 0; i < 15; i++)
  longStr = longStr + longStr;

PerfTestRunner.measureRunsPerSecond({
description: "This benchmark covers `atob` where the input has whitespace.",
  setup: function() {},
  run: function() {
    atob(longStr);
  }
});
</script>
</body>
</html>