These performance numbers were put out by Jeff Dean more than 10 years ago. Since hardware has improved, they are now outdated. However, they still give us some idea of how the operations compare to one another. Simon Eskildsen has collected updated numbers in https://github.com/sirupsen/napkin-math.

Operation Latency (ns)
L1 cache reference 0.5
Branch mispredict 5
L2 cache reference 7
Mutex lock/unlock 25
Main memory reference 100
Compress 1K w/cheap compression algorithm 3,000
Send 2K bytes over 1 Gbps network 20,000
Read 1 MB sequentially from memory 250,000
Round trip within same datacenter 500,000
Disk seek 10,000,000
Read 1 MB sequentially from disk 20,000,000
Send packet CA->Netherlands->CA 150,000,000