title: performance of angularjs ng-click inside ng-repeat
body: <p>It's more a suspicion than an verified problem but..<br>
  I've worked with knockoutjs for a while and there it was a performance issue to create lots of ko click bindings - the better way was to use much fewer jQuery .on('click', ...) to handle these.</p>
  
  <p>Now that I'm diving into angularjs I have a ng-repeat within ng-repeat and inside this second one I have a few buttons with ng-click..</p>
  
  <pre><code>&lt;ul&gt;
      &lt;li ng-repeat="el in collection"&gt;
          &lt;button ng-click="someFn()"&gt;click me&lt;/button&gt;
          &lt;button ng-click="someFn2()"&gt;click me&lt;/button&gt;
          &lt;button ng-click="someFn3(el)"&gt;click me&lt;/button&gt;
      &lt;/li&gt;
  &lt;/ul&gt;
  </code></pre>
  
  <p>Doesn't this create a lot of click event bindings? Or does angular optimise this somehow?</p>