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Ookla's speedtest gives the option of running their speed test using a single-threaded or multi-threaded connection.

According to this source:

Most large downloads [over the web] and streaming services operate over a single connection to the server, so it makes sense to measure the throughput available over a single connection. Personally this is my preferred test when comparing ISPs even though it may not show what the connection is capable of with multiple simultaneous connections.

Why would single-threaded connections be the preferred choice when comparing different ISP speeds? I'm guessing to test the quality of an ISP's connection, right?

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Many ISPs prioritise Ookla traffic, completely messing up any attempt at direct comparison. The best you can do is test both methods & average them.

Try DSLReports instead. It does use different metrics & one could claim it's a 'better' objective test - but more importantly, most ISPs seem to have forgotten to prioritise it, so it can be more accurate as a real-world comparison. It will also test for bufferbloat.

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Clicking the Results gives a far more comprehensive analysis.

No affiliation.

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  • OK, but many tests give you the option of picking between a multi-threaded or single-threaded connection. What I'd like to know is when you should pick one over the other. I'd also like to know why someone would want to use a single-threaded connection to compare different ISPs. Mar 10 at 16:55

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