Code Review Time Estimator
Estimate how long code reviews should take based on PR size and complexity. Set realistic review SLAs for your team.
Our Take
Code review time isn't about speed—it's about predictability. A 4-hour review SLA that's consistently met beats a 1-hour SLA that's constantly missed.
Teams obsess over reducing review times, but consistency matters more than raw speed. When developers know their PR will be reviewed within 4 hours, they can plan their work accordingly. Unpredictable review times—even if occasionally fast—create context-switching chaos and erode trust in the process.
"Teams with review SLAs under 4 hours have 60% higher developer satisfaction scores."
— LinearB State of Engineering Report, 2023
Review Parameters
Enter lines of code above to estimate review time.
Research Behind the Estimates
Cisco Code Review Study: Found that reviewers find fewer defects after 60-90 minutes of continuous review. Beyond this point, fatigue significantly reduces review quality.
Optimal Review Pace: 200-400 lines of code per hour provides the best balance between thoroughness and efficiency. Faster reviews miss defects; slower reviews don't find proportionally more.
Diminishing Returns: Reviews beyond ~400 lines in a single session show sharply diminishing returns. Splitting large PRs leads to better outcomes than marathon review sessions.
<15 min, optimal for small changes
15-45 min, typical feature work
45-90 min, consider breaks
Frequently Asked Questions
A code review should typically take 15-60 minutes, depending on the size and complexity of the change. Research from Cisco shows that reviews longer than 60-90 minutes suffer from diminishing returns, as reviewer fatigue leads to missed defects. For optimal quality, aim for reviews of 200-400 lines of code, which can be completed in 30-45 minutes. Larger changes should be split into smaller, focused PRs.
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