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by rgoulter 2420 days ago
AFAIU this is making use of feature flags.

Uploading new code to a server where the new-code is behind a disabled feature flag means the program hasn't changed. The feature flag can be enabled when it's suitable. (This could even be 'rolled out' to only a subset of users; e.g. testers, internal, 10% of users, etc.)

deploy = put the code on the server, release = enable the feature flags