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출처: http://brenocon.com/dean_perf.html

action ns ms
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns
Mutex lock/unlock 100 ns
Main memory reference 100 ns
Compress 1K bytes with Zippy 10,000 ns 0.1 ms
Send 1K bytes over 1 Gbps network 10,000 ns 0.1 ms
Read 1 MB sequentially from memory 250,000 ns 0.25 ms
Round trip within same datacenter 500,000 ns 0.5 ms
Disk seek 10,000,000 ns 10 ms
Read 1 MB sequentially from network 10,000,000 ns 10 ms
Read 1 MB sequentially from disk 30,000,000 ns 30 ms
Send packet CA->Netherlands->CA 150,000,000 ns 150 ms

Where

  • 1 ns = 10-9 seconds
  • 1 ms = 10-3 seconds

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