Node.js - A practical Introduction

Transcript

1. A practical introduction 15.06.2012 - Big Tech Day 5, Munich

   Felix Geisendörfer

2. Felix Geisendörfer

3. transloadit.com

4. core contributor

5. npm modules

6. node-formidable

7. node-mysql

8. ~50 modules total

9. (@)felixge(.de)

10. Audience

11. Software Developers?

12. JavaScript Developers?

13. Heard about node.js?

14. Using node.js?

15. What is node.js?

16. JavaScript on the Server

17. Hello World

18. 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
19. None
20. None

21. Features • TCP / UDP • HTTP / HTTPS •

    File System • Buffers (byte arrays) • DNS • Child Processes • Http / Https • Crypto • ZLIB • Readline / TTY / REPL

22. < 5 min to install Windows, Mac, Linux

23. History

24. 1995 LiveWire released

25. 1997 Rhino started

26. ...

27. Ryan Dahl starts the node project (first commit) Feb 16,

    2009

28. I discovered node.js (v0.0.6) ~June, 2009

29. Isaac Schlueter starts the npm package manager Sep 29, 2009

30. Ryan’s talk at JSConf.EU gets people excited about node Nov

    7, 2009

31. ...

32. 2012

33. None

34. What is special?

35. Non-blocking I/O

36. var image = fs.readFileSync('some.jpeg'); console.log('hello'); vs fs.readFile('some.jpeg', function(err, image) {

    }); console.log('hello');

37. Easy concurrency

38. Low memory usage

39. Good performance

40. More on performance

41. Google V8

42. None

43. JS -> Assembly

44. Crankshaft JIT

45. Fast

46. Now in Munich

47. Simple Benchmark

48. 1 kb http responses ~6000 requests / second* * per

    CPU core

49. Why JavaScript?

50. // Today (15.06.2012) > (new Date).getMonth() 5

51. > 0.3 + 0.3 + 0.3 0.8999999999999999

52. None

53. Everywhere

54. War on JavaScript

55. No I/O in Standard Lib

56. Use Cases

57. WebSockets

58. Streaming

59. Code Sharing

60. etc.

61. node package manager

62. 10.000+ packages

63. local installs

64. None

65. Join the Community • Mailing list (nodejs, nodejs-dev) • IRC

    (#node.js) - 700+ User online

66. Thank you!

67. Questions? ” http://felixge.de/ [email protected] @felixge

68. Bonus: Live Coding