Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var slice = [].slice.call.bind([].slice)
    var _slice = [].slice
    function slice_wrapper(seq, callback) {
      return _slice.call(seq, callback) }
    
    var r = ""
    var text = Array(100).join('x')
  };
</script>

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slice(text, function(v){ r += v })

slice_wrapper(text, function(v){ r += v })

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