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Internet speed test overstates on Xfinity site

jonblauch
Frequent Visitor
‎04-01-2020 12:05 PM

Internet speed test overstates on Xfinity site

It appears the internet speed test that xfinity provides on their web site produces a vastly higher download speed that 3rd party tests. Is this a well known isuse? Doing tests side by side on the same machine, I get close to 600Mbps on xfinity and about half that externally.

 

Thoughts

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EG
Expert
‎04-01-2020 12:13 PM

Re: Internet speed test overstates on Xfinity site

That's because their speed testing servers lie on *their* network's edge, therefore they are not subject to any third party's potential backbone / routing / distance related latency issues etc.



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jonblauch
Frequent Visitor
‎04-01-2020 03:15 PM

Re: Internet speed test overstates on Xfinity site

Thanks. Makes sense.  Would you expect such a dramatic difference.  B2B I ran the test from xfinity and it tells me 589Mbps and through the test by this site ( speedtest.net) I get 247Mbps.  The upload is virtually the same at 17Mbps.

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