Bufferbloat Test
Bufferbloat is a long delay that appears when the connection is busy, because data waits in a queue. Close other downloads first, so the result shows only your own connection.
Bufferbloat Test
Loading the test…
How this test works
The test reads idle latency first, then loads the line with a download and then an upload. A timing request goes out every 200 ms during each transfer, and requests from its first seconds are dropped. Only the higher of the two loaded results counts.
How to read the result
Rise is loaded latency minus idle latency. Grades: A+ under 5 ms, A under 30 ms, B under 60 ms, C under 200 ms, D under 400 ms, F beyond. The gaming estimate on the speed test page uses loaded latency in place of idle latency when it was measured, so a busy line can fail a check that an idle line passes.
What is typical
On the home page, a grade of B, C, D or F after a good download speed adds a caveat: latency rises during uploads or during downloads, whichever pushed it higher. If latency under load could not be measured, the page says so instead of calling the result steady.