[maxwellito]

That's a good question! But for something under 100Kb it should be pretty quick. Curious to know how long it takes for a whole MB.

Update: Actually, I was too optimistic : https://divan.github.io/posts/animatedqr/

[cyphar]

There was a follow-up post[1] where the author switched to fountain codes (a type of erasure coding that is perfect for this use-case) and apparently the speed is now closer to 25kbps. Pretty neat.

[1]: https://divan.github.io/posts/fountaincodes/