• Development platform built on top of Google V8
• Focused on building server-side applications in Javascript
• Event based
• Asynchronous I/O
• Differ from traditional models
  Receive - Process - Send - Wait - Receive

• Ryan Dahl
• Google V8 engine
• Birth
• Maturity
• Ecosystem

 var http = require('http'); http.createServer(function(request, response) {
    response.writeHead(200, {"Content-Type": "text/plain"});
    response.write("Hello World");
    response.end();
 }).listen(8888);

 var result = database.query("SELECT * FROM hugetable");
 console.log("Hello World");

 database.query("SELECT * FROM hugetable", function(rows) {     var result = rows;     . . .  }); console.log("Hello World");

• 3 GHz processor runs 3x10⁹ instructions / sec
• 1 instruction          ===   1/3^rdof a nanosecond
• L1 and L2 cache   ===    2 - 5 ns
• RAM                             ===    80 ns

• Event model a core feature of the language
• All I/O made non-blocking
• Cascading callbacks
• Only one thing happening at once

• Ordering Books - Call back when available
  
• Mom cooking in the kitchen - event based
  
• Waiting area of a reception in a Hospital - non blocking
  

• Once setup is complete, make all actions event-driven
• If CPU intensive operation needed, delegate to web workers

• Delegate tasks to child processes
• Sharing sockets with children
• Master - Slave
• Direct interaction with I/O - no bottleneck

• EJS (Embedded JS)
• Jade
• Haml
• JQuery templates

 var express = require('express');
 var app = express.createServer();
 app.get('/', function(req, res) {
     res.send('Welcome to Node');
 });
 app.listen(8000);

• events
• http
• dns
• vm
• crypto
• assert
• child_process
• mongoose
• nodedb
• sequelize
• amqp
• meteor and derby

 #include <v8.h>
 using namespace v8;
 extern "C" void init (Handle