One-way news

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  • Wire 14

Difficulty 2 of 5

20,000 browsers watch a status feed. Each browser gets a new text update about every 10 s, and it must arrive within 1 s. Browsers never send messages on this channel. Choose the simplest transport that meets the need. Keep p99 below 150 ms.

Play level

Options

  • A two-way WebSocket channel
  • HTTP/2 polling every second
  • A server-sent event stream
Connections and streamsDrag or use arrow keys to change the protocol

Goals and limits

p99 latency
under 150 ms
Monthly cost
under 100 USD/mo
Traffic
20,000 req/s

Concepts

How players did

Player results load from the server.

All levels