Zero round trips

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  • Wire 07

Difficulty 2 of 5

A repeat visitor has a valid TLS resumption ticket on a 90 ms path. The app sends catalog reads and payment writes. Choose the early data rule. Keep read p99 below 130 ms. A replayed packet must not create a second payment.

Play level

Options

  • Send reads and payments as early data
  • Wait for the handshake on every request
  • Send reads as early data; payments wait
Connections and streamsDrag or use arrow keys to change the protocol

Goals and limits

p99 latency
under 130 ms
Monthly cost
under 100 USD/mo
Traffic
20 req/s

Concepts

How players did

Player results load from the server.

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