5 ms·

140ms is still a ton of time to do a simple transaction

• ivlozada 6mo ago
  It's not simple though. In that 140ms the network is checking fraud rules, validating the card, checking available credit, applying rewards logic, and routing across multiple parties. The actual subtract-one-number-from-another takes microseconds. The rest is trust verification across organizational boundaries — which is the hard part of any payment system.
  • mattclarkdotnet 6mo ago
    At best it’s checking available credit. All the other stuff is done after the fact. The idea that any banking transaction involves “subtracting one number from another” is so wrong it’s barely worth engaging with.
    • skywhopper 6mo ago
      Some (rewards processing) is probably done later, but the fraud check definitely isn’t.
    • dcrazy 6mo ago
      You speak so confidently, yet it appears you’ve never gotten a text asking you to approve or deny a charge that you are performing.