Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var string;
  };

  Benchmark.prototype.teardown = function() {
    string = "";
  };
</script>

Test runner

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Java applet disabled.

string = "test ";
string += "test ";
string += "test ";
string += "test ";
string += "test ";
string += "test ";
 

string = "test "
+"test "
+"test "
+"test "
+"test "
+"test ";

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