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Node.js - A practical Introduction
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Felix Geisendörfer
June 16, 2012
Programming
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Node.js - A practical Introduction
Talk given at Big Tech Day 5 in Munich on 15.06.2012.
Felix Geisendörfer
June 16, 2012
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Transcript
A practical introduction 15.06.2012 - Big Tech Day 5, Munich
Felix Geisendörfer
Felix Geisendörfer
transloadit.com
core contributor
npm modules
node-formidable
node-mysql
~50 modules total
(@)felixge(.de)
Audience
Software Developers?
JavaScript Developers?
Heard about node.js?
Using node.js?
What is node.js?
JavaScript on the Server
Hello World
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
None
None
Features • TCP / UDP • HTTP / HTTPS •
File System • Buffers (byte arrays) • DNS • Child Processes • Http / Https • Crypto • ZLIB • Readline / TTY / REPL
< 5 min to install Windows, Mac, Linux
History
1995 LiveWire released
1997 Rhino started
...
Ryan Dahl starts the node project (first commit) Feb 16,
2009
I discovered node.js (v0.0.6) ~June, 2009
Isaac Schlueter starts the npm package manager Sep 29, 2009
Ryan’s talk at JSConf.EU gets people excited about node Nov
7, 2009
...
2012
None
What is special?
Non-blocking I/O
var image = fs.readFileSync('some.jpeg'); console.log('hello'); vs fs.readFile('some.jpeg', function(err, image) {
}); console.log('hello');
Easy concurrency
Low memory usage
Good performance
More on performance
Google V8
None
JS -> Assembly
Crankshaft JIT
Fast
Now in Munich
Simple Benchmark
1 kb http responses ~6000 requests / second* * per
CPU core
Why JavaScript?
// Today (15.06.2012) > (new Date).getMonth() 5
> 0.3 + 0.3 + 0.3 0.8999999999999999
None
Everywhere
War on JavaScript
No I/O in Standard Lib
Use Cases
WebSockets
Streaming
Code Sharing
etc.
node package manager
10.000+ packages
local installs
None
Join the Community • Mailing list (nodejs, nodejs-dev) • IRC
(#node.js) - 700+ User online
Thank you!
Questions? ” http://felixge.de/
[email protected]
@felixge
Bonus: Live Coding