One path: this browser to one server in Helsinki, over plain HTTPS, now. A Helsinki exit beats a Sydney exit, which is geography rather than provider quality. Your link, Wi-Fi and other traffic move the result.
Run it with the tunnel off, then on. The difference is the overhead.
A single run reads your own connection, never a provider's global network.
Timed in this browser; the server only serves and swallows bytes. A full run moves 13 MB down, 5 MB up, under a minute.
Transfers ramp from 256 KB up. The smallest is discarded: DNS, TLS and slow-start dominate its elapsed time. Ramping stops when one transfer takes twelve seconds.
Keep this tab in the foreground. Background tabs get throttled and skew results.
This tab only; reloading clears it. Label runs before pressing Run. Nothing stored server side.