VISA handles on average around 2,000 transactions per second (tps). It has a peak capacity of around 56,000 tps. However, they never actually use more than about a third of this, even during peak shopping periods.
The Governance of Anarchists :: Blockchain Letter, January 2016
Pantera Capital
445

This is a red herring because in bitcoin world, those transaction actually settle, in VISA world transactions do not settle for 90 days (“chargeback” or Regulation Z can reverse transactions). Not to mention, that if you ask any merchant how long until they get paid for a VISA transaction, it’s unlikely that they will say “within seconds” ;)

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