apas apas

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

	%%-----------------------------------------------------------------------
	%% Make your own quadrille, graph, hex, etc paper!
	%% Uses the pgf/TikZ package for LaTeX, which should be part of
	%% any modern TeX installation.
	%% Email: [email protected]
	%% Twitter: @mcnees
	%%-----------------------------------------------------------------------

	\documentclass[11pt]{article}

	test.html: test.md tufte-css.lua html5.html
	pandoc -t tufte-css.lua -f markdown -c tufte.css --template html5.html test.md > test.html

	html5.html:
	pandoc -D html5 > html5.html

	#!/usr/bin/python
	# TODO make range command line arguments

	import sys, codecs
	sys.stdout = codecs.getwriter('utf-8')(sys.stdout) # if your terminal can't do utf-8, well...

	import time
	import urllib2

	import BeautifulSoup

	# to generate your dhparam.pem file, run in the terminal
	openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048