external-string-pass.html

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<!doctype html>

<script src="util.js"></script>

<script>

  onload = function() {

      var str = new Array(1e6).join("a");

      var div = document.createElement("div");

      // Round-trip through the DOM to make sure we have an external string.

      div.setAttribute("x", str);

      str = div.getAttribute("x");

      var count = 3e7;  // About 1s

      var t = new DataTransfer();

      perf_start();

      for (let i = count; i > 0; --i) {

          t.dropEffect = str;

      perf_finish();

};

</script>