Code Analysis Options
Code Analysis Overview
Code analysis is one of the most effective ways to improve code quality. Different analysis types catch different problems -- potential bugs, performance bottlenecks, security gaps.
Analysis Menu
1. Knowledge Graph Generation
Generate a code knowledge graph to visualize structure:
- Map relationships between components - Dependency relationships between modules
- Visualize dependencies - Dependency visualization
- Identify architectural patterns - Spot architecture patterns
Knowledge graphs help you understand the overall structure of complex codebases.
2. Code Quality Evaluation
Key metrics for evaluating code quality:
- Complexity metrics - Cyclomatic complexity, cognitive complexity
- Maintainability index - How maintainable the code is
- Technical debt assessment - How much tech debt has piled up
- Code duplication detection - Finding copy-pasted code
3. Performance Analysis
Find the bottlenecks:
- Identify bottlenecks - Locate performance hot spots
- Memory usage patterns - How memory is being used
- Algorithm complexity - Algorithm complexity analysis
- Database query optimization - Slow query optimization
4. Security Review
Spot vulnerabilities:
- Vulnerability scanning - Scan for known vulnerabilities
- Input validation checks - Are inputs being validated?
- Authentication/authorization review - Auth and permissions audit
- Sensitive data handling - How sensitive data is managed
5. Architecture Review
Verify design quality:
- Design pattern adherence - Are design patterns being followed?
- SOLID principles compliance - SOLID principles alignment
- Coupling and cohesion analysis - Coupling and cohesion metrics
- Module boundaries - Are module boundaries clear?
6. Test Coverage Analysis
Evaluate test coverage:
- Coverage percentages - Coverage stats
- Untested code paths - Code paths with no tests
- Test quality assessment - Quality of existing tests
- Missing edge cases - Edge cases that aren't covered
Process
Standard workflow for code analysis:
-
Select analysis type based on need
- Pick the right analysis for your goal
-
Run appropriate tools and inspections
- Execute the relevant tools and checks
-
Generate comprehensive report
- Produce a thorough report
-
Provide actionable recommendations
- Give specific, actionable suggestions
-
Prioritize improvements by impact
- Rank improvements by how much they'll help
Output Format
Standard format for analysis reports:
## Executive Summary
Key findings and overall assessment
## Detailed Findings
### Category 1: [Issue Type]
- Finding 1: [Description]
- Location: [File:Line]
- Severity: [High/Medium/Low]
- Recommendation: [Suggestion]
### Category 2: [Issue Type]
...
## Risk Assessment
Risk evaluation and potential impact
## Improvement Roadmap
1. Immediate (This Week): [Urgent fixes]
2. Short-term (This Month): [Important improvements]
3. Long-term (This Quarter): [Optimization projects]
## Code Examples
Relevant code examples and fix suggestions
Common Tools
Static Analysis Tools
| Tool | Language | Purpose |
|---|---|---|
| ESLint | JavaScript/TypeScript | Code style checking |
| SonarQube | Multi-language | Comprehensive quality |
| CodeClimate | Multi-language | Maintainability |
| Snyk | Multi-language | Security scanning |
Performance Tools
| Tool | Purpose |
|---|---|
| Lighthouse | Web performance |
| Chrome DevTools | Runtime analysis |
| Webpack Bundle Analyzer | Bundle analysis |
| clinic.js | Node.js performance |
Using AI for Code Analysis
You can have AI help with code analysis:
Analyze the following code for:
1. Code quality assessment
2. Potential performance issues
3. Security risks
4. Improvement suggestions
[Paste code]
Next Steps
Check out GitHub Issue Analysis to learn how to turn issues into technical specs.
📚 Related resources
❓ Common questions
Open a question to review the practical answer.
How many code analysis types does the chapter cover?
Six: (1) Knowledge Graph Generation — component relationships / dependency visualization / architectural patterns; (2) Code Quality — cyclomatic / maintainability index / tech debt / duplication; (3) Performance — bottlenecks / memory patterns / algorithmic complexity / DB queries; (4) Security — vulnerabilities / input validation / auth / sensitive data; (5) Architecture — SOLID / coupling and cohesion / module boundaries; (6) Test Coverage — percentage / untested paths / test quality.
Which static analysis tool — ESLint / SonarQube / CodeClimate / Snyk — should I pick?
They serve different needs: ESLint is JS/TS-specific lint, run it on every PR; SonarQube is multi-language unified quality with bugs / smells / security in one report, ideal as the main CI gate; CodeClimate emphasizes maintainability index and trend charts, valuable for long-term monorepo tracking; Snyk is vulnerability-focused (dependency CVEs + code layer) and complements GitHub Dependabot. The full stack tends to be ESLint + SonarQube + Snyk.
Should I profile web performance with Lighthouse or Chrome DevTools?
Lighthouse produces composite scores (Performance / Accessibility / SEO / Best Practices) plus LCP / CLS / TBT — ideal for PR automation and periodic regression. Chrome DevTools handles runtime profiling (Timeline / Heap / Network) and pinpoints individual slow operations. The flow: Lighthouse identifies which page has trouble, then DevTools drills into the specific call responsible.
How should an analysis report be organized so readers actually act on it?
The chapter's 5-section template: Executive Summary (key findings + overall verdict), Detailed Findings (grouped by category, each with Location file:line + Severity High/Medium/Low + Recommendation), Risk Assessment (potential impact), Improvement Roadmap (Immediate this week / Short-term this month / Long-term this quarter), Code Examples. Findings without Location and Severity are essentially noise.
How do I prompt AI to do useful code analysis?
The chapter's four-part template: "Analyze this code: 1. Code quality; 2. Potential performance issues; 3. Security risks; 4. Improvement suggestions". The point is enumerating dimensions explicitly rather than asking "take a look at this code". Add three context items — language / framework version / business scenario — otherwise the AI returns generic filler like "consider using more modern syntax".