We Hate Code: The !Joy of Maintaining Dead Code
summary
Conference claims a customer had 50% of deployed code unused and estimates legacy/dead-code costs at billions; it demonstrates tools and workflows: static IDE inspections, SonarQube, OpenRewrite, JaCoCo agents, Flight Recorder and a low‑overhead JVM agent feeding a cloud service. Concrete build: an Intelligence Cloud + OpenRewrite prototype that annotates unused methods and can auto‑remove them after multi‑month monitoring; it runs in production with <1% overhead and requires staged validation before deletion.
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chapters (14)
- 0:00Introduction
- 1:43Cost of bad code
- 3:13Legacy code explained
- 6:43Dead code vs zombie code
- 9:31Why dead code persists
- 11:35Finding unused declarations
- 12:59OpenRewrite automated cleanup
- 15:05Zombie code deep dive
- 17:13Runtime logging approach
- 20:23Flight recorder analysis
- 22:50Jakoko code coverage tool
- 28:50Intelligence Cloud solution
- 35:40Real-world zombie code case
- 37:27Conclusion and Q&A
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