Seems to me it wouldn’t be that hard to test out these fast-blockchain claims. Set up a few hundred public-cloud hosts around the world and send a few thousand TPS at them, see what happens. They’re all open-source AFAIK. But it would cost some real money.
For the record, I’ve been pointed at 3 blockchain implementations which claim high scalability:
* Nano en.wikipedia.org/wiki/Nano_(…
* Avalanche semanticscholar.org/paper/Sn…
* Solana solana.com
Note that all involve a cryptocurrency.
I have not verified any of these claims.
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