Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var buffers = [], i, j, b;
    
    for(i = 0; i < 300; i++)
    {
      b=[];
      for(j=0;j<i%17;j++) b.push(j);
      buffers.push(b);
    }
  };
</script>

Test runner

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var total=0, bufcount = buffers.length, x;
for(x = 0; x < bufcount; x++)
{
  total += buffers[x].length;
}
 

function add(a,b){return a+b;}
function prop(name){ return function(o){return o[name];}; }
var total = buffers.map(prop('length')).reduce(add);

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