Scan or random reads

  • Estimate
  • Metal 03
  • Node

Difficulty 2 of 5

A query reads 16 MiB of rows from main memory. A sequential scan streams at 20 GB/s. An index lookup reads the same bytes as random 64-byte lines, one after another, and each line waits 100 ns for memory. How many ms do the random reads take?

Play level

The question

Answer with one number in ms.

Where a read finds its dataDrag or use arrow keys to pick where the data lives

Goals and limits

Completion time
under 40 ms
Monthly cost
under 1,000 USD/mo

Concepts

How players did

Player results load from the server.

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