However, there is a hurdle on older browsers: Internet Explorer 7 (or earlier) and Firefox 2 (or earlier), the browser strictly adheres to the HTTP specification of only two threads per hostname. Otherwise, it will default to two threads. After the pre-test, if the connection speed is at least 4 megabits per second, then will use four threads. However, it will only use more than two threads if they are needed to accurately measure the speed, so as to minimize the effect of HTTP overhead on lower-speed connections. will use up to four HTTP threads during the download and upload portions of the test. Chunks are sorted by speed, and the fastest half is averaged to eliminate anomalies and determine the result.We'll use up to four HTTP threads here, as well, to saturate the connection.The upload test is then performed in chunks of uniform size, pushed to the server-side script via POST.Based on this result, an appropriately sized chunk of randomly generated data is selected for upload.
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