Numbers Everyone Should Know

http://static.googleusercontent.com/externalcontent/untrusteddlcp/research.google.com/en/us/people/jeff/stanford-295-talk.pdf

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
Send 2K bytes over 1 Gbps network          20,000 ns
Read 1 MB sequentially from memory         250,000 ns
Round trip within same datacenter          500,000 ns
Disk seek                                  10,000,000 ns
Read 1 MB sequentially from network        10,000,000 ns
Read 1 MB sequentially from disk           30,000,000 ns
Send packet CA->Netherlands->CA      150,000,000 ns
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