Slow transfer- add an option to send files without Encryption

I have read previous issues but I have suggestion: Today I found Snapdrop. really happy to know such a great app. But really disappointed when I see such a slow speed. Mostly transfers are between device in a local area network like laptop and android phone. So there is no third party who joins the network. So encryption and decryption is just waste of resources. So it should send and receive files without encryption by default. An option can be added to encrypt files.