createElement_old.js

var frag = document.createDocumentFragment();

for (var i = 0, l = users.length; i < l; i++) {
  var user = users[i];
  var dl = document.createElement('dl');

  var nameTerm = document.createElement('dt');
  nameTerm.textContent = 'name';
  dl.appendChild(nameTerm);

  var nameDesc = document.createElement('dd');
  nameDesc.textContent = user.name;
  dl.appendChild(nameDesc);

  var ageTerm = document.createElement('dt');
  ageTerm.textContent = 'age';
  dl.appendChild(ageTerm);

  var ageDesc = document.createElement('dd');
  ageDesc.textContent = user.age;
  dl.appendChild(ageDesc);

  frag.appendChild(dl);
}

var result = document.getElementById('result');

result.appendChild(frag);