Comcast's Flash-free speedtest page, which isn't widely known:
http://speedtestbeta.xfinity.com
It was created in August 2016. Their Flash-based site at...
http://speedtest.xfinity.com
...is having trouble today with Flash v.24, so on that page,
they're suggesting the Flash-free version.
This is one of the speedtests that I use to stress an Internet
connection, to see how well a router's QOS for VOIP stands up.
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