Engineering @ Facebook: Facebook Chat

Simon Willison - Simon Willison - May 15, 2008

Engineering @ Facebook: Facebook Chat. The new Facebook Chat uses Comet (long polling with a hidden iframe) against a custom web / chat server written in Erlang, designed to handle a launch to all 70 million users at once. It was tested using a “dark launchâ€� period where live pages simulated chat request traffic without showing any visible UI.



Categories: Blogs  Simon Willison  

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