-*- mode: outline; coding: utf-8 -*-

* Numbers everyone should know.

 * 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