S0Ulle33

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

	<!doctype html>
	<html>
	<head>
	<!-- Based on http://codepen.io/lbebber/pen/ypgql -->
	<link href="http://necolas.github.io/normalize.css/3.0.2/normalize.css" rel='stylesheet'/>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/prefixfree/1.0.7/prefixfree.min.js"></script>
	<style>
	/* Just colors and font sizes */
	* {
	font-family: sans-serif;

	[run]
	branch = True
	source = my_django_lib
	omit =
	src/my_django_lib/settings.py
	*/__init__.py

	[paths]
	source = src