Building realtime web apps using node.js, socket.io and knockout.js

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Building realtime web apps using node.js, socket.io and knockout.js

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Building realtime web apps using node.js, socket.io and knockout.js

  1. 1. Building real-time apps with node.js, socket.io and knockout.js Iván Loire twitter: @ivanloire email: ivan@iloire.comFriday, March 9, 2012
  2. 2. node.js high performance javascript library for intensive I/O operations. (like HTTP) single threaded, event oriented. built on Chrome’s Javascript runtime (V8) lightweight, efficient, really fast. .. insanely fast.Friday, March 9, 2012
  3. 3. websockets bi-directional, full duplex over a single tcp socket. connection remains open = no tcp handshake lightweight protocol = no http headers, 2 byte overhead supported chrome 16, FF 11, IE 10, Opera 10 reducing latency from 150 (http) to 50 ms (sockets)Friday, March 9, 2012
  4. 4. socket.io websockets for the rest of us. fallback transports (yes, it also works in IE!!) websockets flash sockets ajax long polling ajax streaming iframe json polling..Friday, March 9, 2012
  5. 5. knockout.js rich, responsive display with a clean underlying data model. declarative bindinds automatic UI refresh dependency tracking templatingFriday, March 9, 2012
  6. 6. ... and a fast database! open source, high performance, in-memory, key-value data store support master-slave replication really fast! if durability is not needed... insanely fast!Friday, March 9, 2012
  7. 7. real-time apps web node.js + redis + socket.io + knockout.js real-time... or close enough?Friday, March 9, 2012
  8. 8. now let’s build a really simple real-time game... https://github.com/iloire/math-race thanks to @gimenete for getting me into node.js! ... and thanks to @jmendiara for the node.js sticker!Friday, March 9, 2012

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