Unverified50% confidenceBenchmarkExact time
Research 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.
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50%
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Long-term
Relevance
9/4/2026
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Related Claims
VerifiedWhen a single code review exceeds 400 lines of code, the reviewer's defect detection rate drops sharply.78% 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%.71% similarUnverifiedAn 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.70% similar
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