gistfile1.txt

var comments = document.querySelectorAll('#comment-list > li');
var winners = {};

getWinnerComment = function(id) {
  return document.querySelectorAll('#' + id + ' .comment-content p')[0].textContent;
}

var iterations = 10000;

while(iterations--){
  var commentsList = [];

  var array = new Uint32Array(comments.length);
  var randomIds = window.crypto.getRandomValues(array);

  Array.prototype.forEach.call(comments, function(el, i){
    if (el.id) commentsList.push({id: el.id, rand: randomIds[i]});
  });

  commentsList.sort(function(a, b) {
    return a.rand - b.rand;
  });
  
  winners [commentsList[2].id] = Number(winners [commentsList[2].id])+1 || 1;
  winners [commentsList[1].id] = Number(winners [commentsList[1].id])+1 || 1;
  winners [commentsList[0].id] = Number(winners [commentsList[0].id])+1 || 1;
  
}

console.dir(winners)