Unverified50% confidenceFactExact time

Google's internal research shows that code review quality drops sharply beyond 400 lines of code.

1

Sources

50%

Confidence

Medium-term (~90 days)

Relevance

7/2/2026

First Seen

Valid until: 9/30/2026

Sources

AI Code Output Up 10x — How Do You Keep Code Review from Collapsing?

bilibili枫叶边城6/15/2026

Related Claims

Verified当一次代码审查超过 400 行代码时，审查者的缺陷发现率会急剧下降75% similar VerifiedGoogle的工程实践研究表明，代码审查能发现约60%的缺陷，远高于单元测试的约30%发现率69% similar UnverifiedCodeGraph测试显示工具调用次数减少约58%65% similar Unverified微软研究院基于数百万次代码审查数据的实证研究显示，当变更集超过400行时，审查者的评论密度显著下降，缺陷逃逸率明显上升64% similar Unverified单纯使用'少写代码'提示词可减少33%代码量，但安全指标下降至95%63% similar

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