Code Review Workflow | 2-4 Hour First Response
Target 2-4 hour first response, complete within 24h. Use smaller PRs, automated checks, and scheduled review time. Same-day reviews improve velocity significantly.
7 min read
Slow code reviews block progress and frustrate developers. Fast reviews ship code quickly but may miss issues. The goal is optimizing for both speed and quality. This guide covers practical approaches to code review optimization.
Review Metrics
| Metric | Target | Red Flag |
|---|---|---|
| First response | <4 hours | >1 day |
| Complete review | <24 hours | >3 days |
| PR size | <400 lines | >1000 lines |
| Review rounds | 1-2 | >4 |
Small PRs
Size Matters
SMALLER PULL REQUESTS
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WHY SIZE MATTERS:
─────────────────────────────────────
Large PRs:
├── Take longer to review
├── Get superficial reviews
├── More likely to have bugs
├── Harder to understand
├── Block other work longer
├── Reviewers put it off
└── Everything suffers
Small PRs:
├── Quick to review
├── Thorough feedback
├── Easy to understand
├── Fast to iterate
├── Ship frequently
└── Better outcomes
SIZE GUIDELINES:
─────────────────────────────────────
├── <200 lines: Easy, quick review
├── 200-400 lines: Reasonable
├── 400-800 lines: Getting large
├── >800 lines: Too big—split it
└── Aim for <400 lines
HOW TO SPLIT:
─────────────────────────────────────
Large feature → Multiple PRs:
├── PR 1: Data models/schema
├── PR 2: Backend API
├── PR 3: Frontend components
├── PR 4: Integration and tests
├── Each is reviewable
└── Stack or merge sequentially
STACKED PRs:
─────────────────────────────────────
PR 1: Base change
└── PR 2: Depends on PR 1
└── PR 3: Depends on PR 2
Benefits:
├── Each PR is small
├── Can review in parallel
├── Merge in sequence
├── Tools help manage
└── Fast iteration
PR Quality
Set Reviewers Up for Success
PR BEST PRACTICES
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CLEAR TITLE:
─────────────────────────────────────
Good title format:
├── [TYPE] Brief description
├── [Feature] Add password reset flow
├── [Fix] Resolve login timeout issue
├── [Refactor] Simplify user service
└── Scannable, descriptive
GOOD DESCRIPTION:
─────────────────────────────────────
Template:
## What
Brief description of the change.
## Why
Why this change is needed. Link to issue.
## How
Key implementation decisions. Any concerns.
## Testing
How was this tested? Any manual steps?
## Screenshots
If UI changes, show before/after.
SELF-REVIEW FIRST:
─────────────────────────────────────
Before requesting review:
├── Read your own diff
├── Check for obvious issues
├── Ensure tests pass
├── Check formatting
├── Remove debug code
├── Don't waste reviewer time
└── First reviewer is you
CHECKLIST:
─────────────────────────────────────
PR checklist:
☐ Tests added/updated
☐ Documentation updated
☐ No console.log or debug
☐ Meets coding standards
☐ Self-reviewed
☐ CI passing
Review Process
Efficient Reviews
REVIEW WORKFLOW
═══════════════
SCHEDULED REVIEW TIME:
─────────────────────────────────────
Block time for reviews:
├── Morning: 30 min review time
├── After lunch: 30 min review time
├── Consistent habit
├── Don't let PRs pile up
├── Part of daily work
└── Priority alongside coding
REVIEW PRIORITIZATION:
─────────────────────────────────────
Order to review:
├── 1. Blocking PRs (others waiting)
├── 2. Small PRs (quick wins)
├── 3. Older PRs (prevent stale)
├── 4. Large PRs (deep focus)
└── Clear the queue efficiently
WHAT TO FOCUS ON:
─────────────────────────────────────
High value:
├── Correctness (does it work?)
├── Design (is it maintainable?)
├── Edge cases (what breaks?)
├── Security (any vulnerabilities?)
├── Architecture (fits the system?)
└── Human judgment areas
Leave to automation:
├── Formatting (Prettier, etc.)
├── Linting (ESLint, etc.)
├── Type checking (TypeScript)
├── Test coverage (CI)
├── Security scanning (CI)
└── Machines are faster
FEEDBACK QUALITY:
─────────────────────────────────────
Good feedback:
├── Specific (not vague)
├── Actionable (what to do)
├── Kind (respectful)
├── Clear severity (blocking vs nit)
└── Constructive
Prefixes:
├── [blocking] Must fix before merge
├── [suggestion] Consider this approach
├── [question] Help me understand
├── [nit] Minor thing, optional
└── Clear expectations
Automation
Let Machines Help
AUTOMATED CHECKS
════════════════
BEFORE HUMAN REVIEW:
─────────────────────────────────────
CI runs:
├── Build passes
├── Tests pass
├── Linting passes
├── Type checking passes
├── Coverage threshold met
├── Security scan clean
├── All green before review
└── Don't review failing PRs
AUTOMATED ASSIGNMENT:
─────────────────────────────────────
Code owners:
├── CODEOWNERS file
├── Auto-assign reviewers
├── Right experts review
├── No manual assignment
└── Faster routing
Auto-assignment rules:
├── Round-robin team
├── Load balancing
├── Expertise matching
├── Fair distribution
└── No one overwhelmed
AUTO FORMATTING:
─────────────────────────────────────
On save or commit:
├── Prettier formats code
├── ESLint fixes issues
├── No formatting debates
├── Consistent codebase
├── Review focuses on logic
└── Time saved
STATUS CHECKS:
─────────────────────────────────────
Required checks:
├── ci/build: ✓ Passed
├── ci/test: ✓ Passed
├── ci/lint: ✓ Passed
├── security/scan: ✓ Passed
├── coverage: ✓ 87% (≥80%)
└── All must pass to merge
Team Agreements
Review Standards
TEAM REVIEW AGREEMENTS
══════════════════════
RESPONSE TIME SLA:
─────────────────────────────────────
Team agreement:
├── First response: <4 hours
├── Complete review: <24 hours
├── Urgent PRs: <2 hours
├── Explicit expectations
├── Tracked and measured
└── Everyone commits
APPROVAL REQUIREMENTS:
─────────────────────────────────────
Define clearly:
├── How many approvals? (1-2)
├── Who can approve?
├── Code owner required?
├── When to override?
├── Emergency process?
└── Written guidelines
FEEDBACK NORMS:
─────────────────────────────────────
How we give feedback:
├── Be kind and respectful
├── Ask questions, don't assume
├── Explain the "why"
├── Use prefixes for severity
├── Praise good code too
├── Assume good intent
└── Team culture
WHEN TO MERGE:
─────────────────────────────────────
Merge when:
├── Required approvals received
├── All checks passing
├── All blocking comments resolved
├── No unresolved conversations
└── Clear criteria
GitScrum Integration
Review Tracking
GITSCRUM FOR CODE REVIEW
════════════════════════
TASK STATUS:
─────────────────────────────────────
Workflow columns:
├── In Progress → PR opened
├── In Review → Awaiting review
├── Done → PR merged
├── Automatic transitions
└── Status visibility
PR VISIBILITY:
─────────────────────────────────────
On task:
├── PR link visible
├── PR status (open, merged)
├── Review status
├── Checks status
├── Context at a glance
└── Integrated view
METRICS:
─────────────────────────────────────
Track review health:
├── Average review time
├── Review SLA compliance
├── PR size distribution
├── Blocked task time
├── Data for improvement
└── Measure and improve
Best Practices
For Code Review Optimization
Anti-Patterns
CODE REVIEW MISTAKES:
✗ Large PRs (>1000 lines)
✗ Reviews taking days
✗ Reviewing failing CI
✗ Formatting debates
✗ No response time expectations
✗ One person bottleneck
✗ Rubber stamp approvals
✗ Harsh or personal feedback