Exploring Differences and Commonalities between Feature Flags and Configuration Options
Feature flags for continuous deployment and configuration options for customizing software share many similarities, both conceptually and technically. However, neither academic nor practitioner publications seem to distinguish these two concepts. We argue that a distinction is valuable, as applications, goals, and challenges differ fundamentally between feature flags and configuration options. In this work, we explore the differences and commonalities of both concepts to help understand practices and challenges and to help transfer existing solutions (e.g., for testing). To better understand feature flags and how they relate to configuration options, we performed nine semi-structured interviews with feature-flag experts. We discovered a number of distinguishing characteristics but also opportunities for knowledge and technology transfer across both communities. Overall, we think that both communities can learn from each other.
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Software Engineering in Practice
Jens MeinickeCarnegie Mellon University, Chu-Pan WongCarnegie Mellon University, Bogdan VasilescuCarnegie Mellon University, Christian KästnerCarnegie Mellon UniversityPre-print