An extension of continuous integration where every code change that passes automated tests is automatically released to production without human intervention. It enables rapid delivery of features and fixes to users.
Evolved from continuous integration in the mid-2000s as companies like Flickr and Netflix pioneered automated deployment. 'Deployment' comes from French 'déployer' meaning 'to unfold' or 'to spread out,' originally a military term for positioning troops.
Continuous deployment requires incredible confidence in your automated testing because there's no human safety net! Companies like Amazon deploy code every 11.7 seconds on average—they've essentially turned software releases from special events into routine, invisible operations.
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