... The tool relies on users from around the country running tests in which the user's computer transmits data at a constant bit rate, while ShaperProbe's 48 Linux-based server instances watch incoming traffic to see if that rate degrades in predictable ways over time. Using the M-Lab infrastructure, ShaperProbe has collected more than 1 million trial runs from 5,700 ISPs over the last two years (run your own test). ...

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