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Copy tests about different array types

Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var sectorcount = 48;
    var sectorsize = 512;
    var cnt = sectorsize * sectorcount;
    var aru = new Uint8Array(cnt);
    var aru_dest = new Uint8Array(cnt);
    var arn = new Array(cnt);
    var arn_dest = new Array(cnt);
    var rand = Math.floor(Math.random() * (cnt + 1))
    var rand2 = Math.floor(Math.random() * (cnt + 1))
    
    for (i = 0; i < cnt; i++) {
      aru[i] = 0xff;
      aru_dest[i] = 0xff;
      arn[i] = 0xff;
      arn_dest[i] = 0xff;
    }
  };
</script>

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arn_dest[rand] = arn[rand2];

aru_dest[rand] = aru[rand2];

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