Latency
- The time it takes an operation to complete in a system
Examples of Orders of Magnitudes
- Reading 1 MB from computer memory
- 250 $\mu$s (0.25 ms)
- Reading 1 MB from SSD
- 1000 $\mu$s (1 ms)
- Transferring 1 MB over the network
- 10,000 $\mu$s (10 ms)
- Reading 1 MB from HDD
- 20,000 $\mu$s (20 ms)
- Inter-continental round trip
- 150,000 $\mu$s (150 ms)