A rebuttal of a 2015 Microsoft paper claiming code reviews don't find bugs. The author argues the paper's statistic—that only 15% of review comments indicate defects—is misleading, as it says nothing about defect detection rates. Research shows code review finds ~60% more defects for only a 15% time increase, with reviewers uncovering roughly one defect per 10 minutes when reviewing small chunks. The post also highlights code review's underappreciated value for knowledge sharing: just four reviews of a codebase section can bring a reviewer up to average familiarity. The author concludes the real issue in the Microsoft study is likely the 24-hour median review turnaround time, not code review itself.
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