Sean SeanDongX

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

	import win32com.client, datetime
	from datetime import date
	from dateutil.parser import *
	import calendar
	import pandas as pd

	# Step 1, block 1 : access Outlook and get the events from the calendar
	Outlook = win32com.client.Dispatch("Outlook.Application")
	ns = Outlook.GetNamespace("MAPI")
	appts = ns.GetDefaultFolder(9).Items

	import java.io.*;
	import java.net.ServerSocket;
	import java.net.Socket;

	public class SocketServer {

	public static final int port = 12345;
	private ServerSocket server;

	public void listen() {

	public class MvcApplication : HttpApplication
	{
	protected void Application_Start()
	{
	AreaRegistration.RegisterAllAreas();
	GlobalConfiguration.Configure(WebApiConfig.Register);
	FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
	RouteConfig.RegisterRoutes(RouteTable.Routes);
	BundleConfig.RegisterBundles(BundleTable.Bundles);
	}

	var express = require('express')
	, mongoskin = require('mongoskin')

	var app = express()
	app.use(express.bodyParser())

	var db = mongoskin.db('localhost:27017/test', {safe:true});

	app.param('collectionName', function(req, res, next, collectionName){
	req.collection = db.collection(collectionName)

	var page = require('webpage').create();
	page.open('/url', function () {

	var items = ['selector1', 'selector2', 'selector3'];
	var items_length = items.length;

	for (var i = 0; i < items_length; i++) {
	var clipRect = page.evaluate(function (s) {
	var cr = document.querySelector(s).getBoundingClientRect();
	return cr;

	# xcode-build-bump.sh
	# @desc Auto-increment the build number every time the project is run.
	# @usage
	# 1. Select: your Target in Xcode
	# 2. Select: Build Phases Tab
	# 3. Select: Add Build Phase -> Add Run Script
	# 4. Paste code below in to new "Run Script" section
	# 5. Drag the "Run Script" below "Link Binaries With Libraries"
	# 6. Insure that your starting build number is set to a whole integer and not a float (e.g. 1, not 1.0)

	var UserModel = function () {
	var self = this;

	// Somewhat sophisticated loading flag that supports parallel loading of multiple endpoints.
	self.loading = ko.observableArray();

	// Encapsulating the entire form in a property, so we can use ko.mapping in a safe way.
	// If properties were directly on the model, we'd have to re-init model every time we
	// load data, which could lead to unwanted consequences.
	self.user = ko.observable();

	uploader.bind('FilesAdded', function(up, files) {
	//console.log (up);
	//console.log (files);
	$.each(files, function(i, file) {
	$('#filelist').append(
	'<div id="' + file.id + '">' +
	file.name + ' (' + plupload.formatSize(file.size) + ') <b></b>' +
	'<a href="" class="remove btn error">X</a></div>'
	);
	$('#uploadfiles').css('display', 'initial');

	<!DOCTYPE html>
	<html>
	<head>
	<title>Knockout Demo</title>
	<script type="text/javascript" src="jquery-1.6.4.min.js"></script>
	<script type="text/javascript" src="jquery.tmpl.js"></script>
	<script type="text/javascript" src="knockout.js"></script>
	<style type="text/css">
	.selected {
	border: #FFFF00 3px solid;