suppose we dark launch a new feature that poses significant release risk, such as new search features, account creation processes, or new database queries. After all the code is in production, keeping the new feature disabled, we may modify user session code to make calls to new functions—instead of displaying the results to the user, we simply log or discard the results. For example, we may have 1% of our online users make invisible calls to a new feature scheduled to be launched to see how our new feature behaves under load. After we find and fix any problems, we progressively increase the
...more
