AI-generated PRs reviewed faster but wait 4.6x longer to be picked up, data shows

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A LinearB report analyzing over 8.1 million pull requests across 4,800+ organizations found that AI-generated PRs wait more than 16 hours before a reviewer opens them, compared to roughly 200 minutes for manually written ones. Once picked up, however, AI PRs are reviewed twice as fast as their manual counterparts. The merge rate tells a starker story: only 32.7% of AI-generated PRs are merged within 30 days, versus 84.4% for manual work. Reviewers are thought to hesitate partly because AI PRs tend to be significantly longer, averaging 408 lines at the 75th percentile against 157 lines for manual PRs. Experts suggest the real bottleneck is the wait time before review begins, not the review itself, and advise teams to measure time-to-first-review separately from time spent in review.

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ProgrammingDEV Community ·

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