Latency numbers
Latency Comparison Numbers (~2012)
Conclusion
- Disk is much slower than the memory
- Avoid the disk seek if possible
- Compressing data is worth to consider before sending over network
- It takes time to send data between data centers if they are in different regions
Reference
- https://computers-are-fast.github.io/
- http://research.google.com/people/jeff/ by Jeff Dean
- http://norvig.com/21-days.html#answers by Peter Norvig
- Humanized comparison: https://gist.github.com/hellerbarde/2843375
- Visual comparison chart: http://i.imgur.com/k0t1e.png