I was just curious about this discussion on stackoverflow and decided to do own test:

[javascript]
for(var i = 0; i < 100000; i++){
randomKey = randomString();
bigScope1[randomKey] = randomString();
bigScope2[randomKey] = randomString();
bigNgBindTempalte += ‘<div class="’ + randomString() + ‘" ng-bind="’+ randomKey + ‘"></div>’;
bigExpressionTemplate += ‘<div class="’ + randomString() + ‘">{{‘ + randomKey + ‘}}</div>’;
}

// console.time(‘ngBind’);
// $compile(‘<div>’ + bigNgBindTempalte + ‘</div>’)(bigScope1);
// console.timeEnd(‘ngBind’);

console.time(‘expression’);
$compile(‘<div>’ + bigExpressionTemplate + ‘</div>’)(bigScope2);
console.timeEnd(‘expression’);
[/javascript]

code.

and indeed ngBind is faster,my machine for 100000 iterations shows:

ngBind: 46984.981ms
expression: 51107.555ms

It’s still not clear why the result are so weird when you run it together (one by one). But it’s another question.