• L1 cache reference: 0.5ns: typical L1 cache size: 64k
• branch mispredict: 5ns
• L2 cache reference: 7ns: newer chips have L2 and L3 cache; sizes from 256k to 8M
• mutex lock/unlock: 100ns
• memory reference: 100ns
• compress 1K bytes with Zippy: 10μs: gzip?
• send 2K bytes over 1 Gbps network: 20μs
• read 1 Mb sequentially from memory: 250μs
• round trip within datacenter: 500μs
• disk seek: 10ms 0.1ms for SSDs
• read 1 Mb sequentially from network: 10ms
• read 1 Mb sequentially from disk: 30ms: 6ms - 30ms for SSDs?
• send packet CA to Netherlands to CA: 150ms

Credits to Jeaf Dean and hyperpolyglot