I don't believe the Resource Timing API <http://www.w3.org/TR/resource-timing/> includes a 100% clean method for getting the timing information corresponding to an XmlHttpRequest object. If this is the case, it might help users to include a simple lookup as part of the API.
My use case: I'd like to get request timing information for a particular XmlHttpRequest so I can set timeouts for various stages of the request. For example, I don't want my network timeout budget to include time spent waiting for other, unrelated connections to finish. It seems I can use the URL being requested with window.performance.getEntriesByName. However, if there are multiple requests to the same URL, I don't know of a 100% reliable way of matching my XmlHttpRequest object up with the returned entries. Perhaps it's possible by using the workerStart timestamp, but if so that seems clumsy. Thanks, Red
