The latency ladder

  • Order
  • Level 2 of 41
  • Signal

Difficulty 1 of 5

Order eight operations from the shortest delay to the longest. Compare local work with a network round trip.

Play level

Put these steps in order

  • Mobile round trip
  • Redis read in one zone
  • CPU cache read
  • Cross-ocean round trip
  • NVMe read
  • CDN hit
  • RAM read
  • Indexed database read
A page waits for its slowest callDrag or use arrow keys to change the calls per page

Goals and limits

p99 latency
under 200 ms
Monthly cost
under 10 USD/mo
Traffic
100 req/s

Concepts

How players did

Player results load from the server.

All levels