Length of the time-out in seconds, for each latency unit testģ seconds for all platforms except on the web. Number of bytes typically exchanged for each latency unit test Number of latency unit tests (if overall time-out has not expired) HTTPS port 5060 (or alternate server port).HTTPS port 8080 (or default server port).WSS (websockets) port 5060 (or alternate server port).WSS (websockets) port 8080 (or default server port).The protocol and port combinations used in sequence are: The succeeding protocol and port combination is then used for the Latency stage. If the connection cannot be established within 3 seconds, the application will attempt connecting using the next protocol and port combination, leaving the previous connections open, until any connection succeeds. On tests from web clients, multiple methods are used to establish a connection, using different combinations of protocol and port. The application establishes a TCP connection to the server, and exchanges some initial handshake traffic to ensure the connection is functional and minimally warmed up. The measurement with the lowest value is displayed to the user as the final latency measure. The latency test stage repeats this process 10 times.
Version of the Internet Protocol (IP) and selection method usedĪ single measurement is taken by measuring the elapsed time between sending a short 22 bytes long message and receiving a response of the same size. Yes, our test methodology takes consideration of slow start and uses the peak sustained throughput measurement Information on whether or not slow start has been removed The mobile, desktop and embedded applications use a proprietary encryption algorithm. The Web based test uses HTTPS with TLS v1.2. However, in order to reduce the duration of the test and avoid consuming unnecessary data, the application implements an algorithm designed to end the test early if little to no variance in the measured bandwidth is noticed. Length of each test (provided the volume threshold has not been reached)ġ5 Seconds Download + 15 seconds Upload, we use a stable stop rather than a data cap as outlined in the below point. The minimum is 4 with scaling running to as many as 16 X 4 servers in the multi server testing environment. However in a dynamic environment the number of connections can scale to meet demand. This is test dependent, there is the capacity to manually select a single connection test.
Number of connections used simultaneously during the speed test We still maintain a legacy fallback to HTTP tests in instances where a TCP test will be unsuccessful. Ookla has developed and implemented a proprietary Speedtest server and test protocol, utilizing both TCP and UDP, which is now the default mechanism used by all applications.
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