Pause the downloads before starting.
The ones on top have the best download speed. It runs on your computer and results vary according to your network speed and other factors. Perform a download speed test (GET) and a response time test (HTTP HEAD, no ping) for each instance. The rest of the information is pre-processed with jitsi-list-generator. The list of instances is based on that of favstarmafia.
To see the documentation, or if you want to leave your experience, help with the code, or make your own version access the Gitlab repository (in spanish).