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 launch” period where live pages simulated chat request traffic without showing any visible UI.
Recent articles
- The evolution of OpenAI's mission statement - 13th February 2026
- Introducing Showboat and Rodney, so agents can demo what they’ve built - 10th February 2026
- How StrongDM's AI team build serious software without even looking at the code - 7th February 2026