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    <p>Yes, you're right that if the user clicks away from the site before ga.js has loaded and has executed the __utm.gif request to Google's servers, then it will not track the _gaq array and that information is gone forever. But this version code still provides many benefits over the older synchronous code.</p> <p>First, the loading of ga.js using this method is <em>not</em> blocking. </p> <p>Cleverly, the loading of ga.js is injected indirectly via JavaScript, rather than through a hard-coded <code>&lt;script&gt;</code> tag. As per <a href="http://googlecode.blogspot.com/2009/12/google-analytics-launches-asynchronous.html" rel="nofollow noreferrer">Google Code Blog</a>,</p> <blockquote> <p>The second half of the snippet provides the logic that loads the tracking code in parallel with other scripts on the page. It executes an anonymous function that dynamically creates a element and sets the source with the proper protocol. As a result, most browsers will load the tracking code in parallel with other scripts on the page, thus reducing the web page load time. </p> </blockquote> <p>This means that the loading of ga.js occurs in a non-blocking way for most modern browsers (and as a benefit, the async="true" part, currently supported in <a href="https://stackoverflow.com/questions/1834077/which-browsers-support-script-async-async/6766189#6766189">FF 4+, IE10p2+, Chrome 12+, Safari 5.1+,</a> formalizes this asynchronization). This mildly reduces load time, and mildly reduces the likelihood that clicks will occur before ga.js has loaded. </p> <p>The benefit of queuing up the _gaq array in advance is to prevent race conditions; priorly, if you tried to make GA calls before ga.js loaded (say, Event Tracking a video play), it would throw an error and the Event call would be lost and never recoverable. This way, as long as the ga.js eventually loads, the _gaq array is ready to serve it all of the calls at load time. </p>
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    1. COcan you provide a working link? that one seems to be broken
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    2. COFixed the link; it's http://googlecode.blogspot.com/2009/12/google-analytics-launches-asynchronous.html
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