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How fast is magic wormhole? In my experience most of the new(er) file transfer apps based on WebRTC are just barely faster than Bluetooth and are unable to saturate the bandwidth. I am not sure if the bottleneck is in the WebRTC stack or whether there is something fundamentally wrong about the protocol itself.



All magic wormhole is doing is agreeing a key, and then moving the encrypted data over TCP between sender and recipient.

So for a non-trivial file this is in principle subject to the same performance considerations as any other file transfer over TCP.

For a very tiny file, you'll be dominated by the overhead of the setup.




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