Visa's fact sheet[0] says that they processed about 6500 transactions per second on average for a recent 12-month period. A Solana dashboard[1] says that Solana processed about 2700 transactions per second on average for a recent period of a few hours.
If we would like to pick nits, we could say that the Visa transactions are not comparable to the Solana transactions because Solana transactions let users run complex programs that Visa does not, or that Solana transactions are not comparable to Visa transactions because nobody accepts SPL USDC and everyone pays out the nose to accept Visa, or that 2700 is a lot less than 6500, or that the 6500 number is misleading because the load should have peaks, and do we really know how much peak load Solana can handle, or that only about 1/3 of the Solana transactions are actual useful stuff for users and the rest are consensus messages. But my point is that these things are only "too slow compared to Visa" by a reasonably small factor now, like 6500 vs 900. Thanks.
If we would like to pick nits, we could say that the Visa transactions are not comparable to the Solana transactions because Solana transactions let users run complex programs that Visa does not, or that Solana transactions are not comparable to Visa transactions because nobody accepts SPL USDC and everyone pays out the nose to accept Visa, or that 2700 is a lot less than 6500, or that the 6500 number is misleading because the load should have peaks, and do we really know how much peak load Solana can handle, or that only about 1/3 of the Solana transactions are actual useful stuff for users and the rest are consensus messages. But my point is that these things are only "too slow compared to Visa" by a reasonably small factor now, like 6500 vs 900. Thanks.
0: https://usa.visa.com/dam/VCOM/global/about-visa/documents/ab...
1: https://solanabeach.io/