Verified80% confidenceFactTime unknown
When a single code review exceeds 400 lines of code, the reviewer's defect detection rate drops sharply.
6
Sources
80%
Confidence
Long-term
Relevance
6/1/2026
First Seen
Sources
Cursor BugBot Tutorial: Set Up AI Automated Code Review in Three Steps
bilibiliCursorInsider
Related Entities
Related Claims
UnverifiedAn empirical study by Microsoft Research based on data from millions of code reviews shows that when a changeset exceeds 400 lines, reviewer comment density drops significantly and defect escape rates rise noticeably.79% similarUnverifiedResearch indicates that the effective review capacity of a human reviewer for a single PR is approximately 200–400 lines of code, beyond which review quality declines significantly.78% similarUnverifiedResearch shows that code review can reduce defect rates by 60%–90%.75% similarUnverifiedA study published in IEEE Transactions on Software Engineering in 2019 showed that code reviews assisted by good visualization had a defect detection rate approximately 25% higher than plain-text reviews, with review time reduced by approximately 30%.73% similarUnverifiedMicrosoft's research indicates that review quality drops significantly for PRs with changes exceeding 200 lines.73% similar
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