A home wi-fi speed fix

Bad, blue-tinted speed results from Speedtest.net My wi-fi signal became irritatingly slow sometimes, making videos stall. Then, for no apparent reason, the speed would pick up again. (OK, for me a speed of over 4Mbps is fast enough. Not starry, but adequate for my needs.)
The problem wasn’t with my ISP. Teksavvy has delivered reliable service consistently. Google revealed the culprit… a “traffic-shaping” setting on my wi-fi router. Once I turned of the QoS feature in my router, bingo!
Here’s the URL that set me straight.