Bufferbloat Test
Does a call turn choppy the moment someone starts a download? This test loads your connection on purpose and shows how much the delay grows when the line is busy.
Bufferbloat Test
Loading the test…
How this test works
The line is measured while idle first. Then, while the page downloads and while it uploads, it sends requests one after another with a 200 ms pause between them and records the answer times. Requests from the opening seconds of a transfer are left out. The worse of the two loaded values is set against the idle value.
How to read the result
The number that matters is the rise: how much slower the line answers when it is busy. A+ means a rise below 5 ms, A below 30 ms, B below 60 ms, C below 200 ms, D below 400 ms and F beyond that. On the home page, grade C counts as a mild flag, D as a strong one and F as a severe one.
What is typical
On the home page, grade D or F changes the headline word to Tense when busy, unless download is under 2 Mbit/s or was not measured. Grade C changes it to Uneasy under load, but only when none of the earlier words applies.