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Feature Flags: Progressive Delivery and A/B Testing

Implement feature flags for safe deployments. Progressive rollouts, A/B testing, and feature management.

Ankit 10 min readFebruary 16, 2025

Feature Flags

Decouple deployment from release with feature flags.

Benefits

  • Safe deployments
  • Progressive rollouts
  • A/B testing
  • Kill switches
  • Trunk-based development

Types of Flags

Release Flags

  • Feature rollout
  • Temporary

Experiment Flags

  • A/B testing
  • Data-driven decisions

Operational Flags

  • Circuit breakers
  • Performance tuning

Tools

  • LaunchDarkly
  • Split
  • Flagsmith
  • ConfigCat

Best Practices

  1. Clean up old flags
  2. Document flag purposes
  3. Limit flag complexity
  4. Test all variations

Conclusion

Feature flags enable safer, more controlled software delivery.

Feature FlagsA/B TestingDevOps

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