Preparation code

<script>
var ints1 = [];
var ints2 = [];
var ints3 = [];

for (var i = 0; i < 1024 * 1024; i++) {
  ints1.push(Math.floor(Math.random() * (ints1.length + 1)));
}
for (var i = 0; i < 1024 * 1024 * 10; i++) {
  ints2.push(Math.floor(Math.random() * (ints2.length + 1)));
}
for (var i = 0; i < 1024 * 1024 * 50; i++) {
  ints3.push(Math.floor(Math.random() * (ints3.length + 1)));
}

</script>
<script>
  Benchmark.prototype.setup = function() {
    var icur = 0;
    
    // http://stackoverflow.com/questions/962802#962890
    
    //    current = Math.floor(Math.random() * (top + 1));
  };
</script>

Test runner

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icurs=[];
for(var attempt=0;attempt<100;attempt++){
icur = Math.floor(Math.random() * (ints1.length + 1));
for (var i = 0; i < 1024 * 102; i++) {
  icur = ints1[icur];
}
icurs.push(icur);
}
console.log(icurs[5]);
 

icurs=[];
for(var attempt=0;attempt<100;attempt++){
icur = Math.floor(Math.random() * (ints2.length + 1));
for (var i = 0; i < 1024 * 102; i++) {
  icur = ints2[icur];
}
icurs.push(icur);
}
console.log(icurs[5]);
 

icurs=[];
for(var attempt=0;attempt<100;attempt++){
icur = Math.floor(Math.random() * (ints3.length + 1));
for (var i = 0; i < 1024 * 102; i++) {
  icur = ints3[icur];
}
icurs.push(icur);
}
console.log(icurs[5]);
 

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