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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>
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