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JS createDocumentFragment to avoid reflow
// http://www.slideshare.net/nzakas/high-performance-javascript-amazon-devcon-2011
var list = document.getElementsByClassName('items')[0],
fragment = document.createDocumentFragment(),
i, item;
for (i=0; i < 10; i++) {
item = document.createElement('li');
item.innerHTML = 'item #'+i;
fragment.appenChild(item);
}
list.appenChild(fragment);
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