Numbers Everyone Should Known from Dean 2009
============================================
This group of numbers is from a presentation Jeff Dean gave at a
Engineering All-Hands Meeting at Google 2009.

-  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

Ref: https://gist.github.com/2843375