Unverified50% confidenceFactExact time
An 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.
1
Sources
50%
Confidence
Long-term
Relevance
8/4/2026
First Seen
Sources
Devin Stacked PRs功能详解：自动拆分大任务为可审查的小PR栈
Related Claims
VerifiedWhen a single code review exceeds 400 lines of code, the reviewer's defect detection rate drops sharply.79% similarVerifiedGoogle's engineering practice research indicates that code review can detect approximately 60% of defects, far exceeding the approximately 30% detection rate of unit testing.68% 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%.65% similarUnverifiedGoogle内部研究显示，当工具误报率超过10%时，开发者的采纳率会急剧下降65% similarUnverifiedGoogle's internal research shows that code review quality drops sharply beyond 400 lines of code.64% similar
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