This test will run one (1) XMLHttpRequest (XHR). The server returns chunks of information at a random interval between 1-10 seconds. This is repeated 10 times. All the time the connection stays open (i.e. interactive state; check the readyState value). The return value is a tuple that is used to change the background color of this document.
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Run again

Note: the Avast web shield blocks all states < 4. I didn't find a solution for it, other then adding a mime type exception in Avast for text/xml.