The Netflix speed tests that we have reported are part of the Netflix app. You go to Netflix settings and scroll down to check your network. It will check the connection to Netflix server 1, Netflix server 2, and Netflix server 3. It then reports your connection speed. This works for the Netflix apps on both of my Sony TV’s, my 4K Roku, and my Amazon 4K Firestick. The Netflix app on my Apple TV does not appear to have the diagnostics available.
For the Amazon 4K Firestick there is an app called Developer Tools Menu. This allows you to turn on System X-Ray and Advanced Options. When this is turned on it creates 2 overlays that stay on the screen regardless of what app is running.
The one overlay shows CPU usage of the 4 cores, memory usage, and network diagnostics.
The other overlay displays the audio and video codecs, input bitrate, frames dropped, resolution, and frame rate.
This is normally used by developers to test their apps on the Firestick.
I have found it useful when debugging Dish Anywhere on my sons’s TV.
Another useful tool is YouTube’s Stats for Nerds. It also creates an overlay with a lot of diagnostics.
Another useful app for the Amazon Firestick is Analiti (WiFi tester & analyzer). A detailed test gives a lot of information concerning your network.
Being a retired engineer in process control I like to compare using these tools
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