Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var f1 = function() {
    
        function r(i) {
          return i + 1;
        }
    
        for (var i = 0; i < 100; i++) {
          r(i);
        }
    
        };
    
    var f2 = (function() {
    
      function r(i) {
        return i + 1;
      }
      return function() {
        for (var i = 0; i < 100; i++) {
          r(i);
        }
      };
    })();
    
  };
</script>

Test runner

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f1();

f2();

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