Performing an internet speed test from your Raspberry Pi is a good way to confirm that you are getting the expected download and upload speeds to your device. If you suspect that websites or other external connections are loading slower than they should be, performing a speed test is the first troubleshooting step to take, and allows us to see if our suspicions are correct. After the speed test, we can pinpoint the source of slow downs as either the connection to a router or other local device, or perhaps the ISP itself is the problem.
This is a companion discussion topic for the original entry at https://linuxconfig.org/how-to-perform-internet-speed-test-on-raspberry-pi