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A practical introduction 15.06.2012 - Big Tech Day 5, Munich Felix Geisendörfer
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Felix Geisendörfer
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transloadit.com
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core contributor
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npm modules
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node-formidable
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node-mysql
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~50 modules total
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(@)felixge(.de)
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Audience
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Software Developers?
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JavaScript Developers?
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Heard about node.js?
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Using node.js?
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What is node.js?
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JavaScript on the Server
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Hello World
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1 var http = require('http'); 2 3 http.createServer(function(req, res) { 4 res.end('Hello World'); 5 }).listen(8080); hello world http server in node.js
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Features • TCP / UDP • HTTP / HTTPS • File System • Buffers (byte arrays) • DNS • Child Processes • Http / Https • Crypto • ZLIB • Readline / TTY / REPL
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< 5 min to install Windows, Mac, Linux
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History
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1995 LiveWire released
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1997 Rhino started
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...
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Ryan Dahl starts the node project (first commit) Feb 16, 2009
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I discovered node.js (v0.0.6) ~June, 2009
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Isaac Schlueter starts the npm package manager Sep 29, 2009
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Ryan’s talk at JSConf.EU gets people excited about node Nov 7, 2009
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...
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2012
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What is special?
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Non-blocking I/O
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var image = fs.readFileSync('some.jpeg'); console.log('hello'); vs fs.readFile('some.jpeg', function(err, image) { }); console.log('hello');
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Easy concurrency
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Low memory usage
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Good performance
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More on performance
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Google V8
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JS -> Assembly
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Crankshaft JIT
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Fast
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Now in Munich
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Simple Benchmark
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1 kb http responses ~6000 requests / second* * per CPU core
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Why JavaScript?
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// Today (15.06.2012) > (new Date).getMonth() 5
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> 0.3 + 0.3 + 0.3 0.8999999999999999
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Everywhere
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War on JavaScript
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No I/O in Standard Lib
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Use Cases
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WebSockets
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Streaming
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Code Sharing
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etc.
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node package manager
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10.000+ packages
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local installs
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Join the Community • Mailing list (nodejs, nodejs-dev) • IRC (#node.js) - 700+ User online
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Thank you!
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Questions? ” http://felixge.de/ felix@debuggable.com @felixge
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Bonus: Live Coding