performance-optimization

Optimize application performance for speed, efficiency, and scalability. Use when improving page load times, reducing bundle size, optimizing database queries, or fixing performance bottlenecks. Handles React optimization, lazy loading, caching, code splitting, and profiling.

1.04x

Quality

78%

Does it follow best practices?

Impact

100%

1.04x

Average score across 3 eval scenarios

Securityby

Passed

No known issues

Optimize this skill with Tessl

npx tessl skill review --optimize ./.agent-skills/performance-optimization/SKILL.md

Evaluation results

100%

E-Commerce Dashboard Performance Review

React rendering performance optimization

Criteria

Without context

With context

React.memo on ProductCard

100%

React.memo on ProductList

100%

useMemo for filtered products

100%

useCallback for addToCart

100%

Lazy import for HeavyChart

100%

Suspense wrapping HeavyChart

100%

web-vitals import

100%

All core Web Vitals captured

70%

100%

Web Vitals callback wired

100%

No static HeavyChart import

100%

Bundle Size Audit and Optimization

Bundle size reduction and tree shaking

Criteria

Without context

With context

Lodash path import

100%

No full lodash import

100%

Dynamic import for d3 or analytics lib

100%

Dynamic import for pdfmake

100%

No static pdfmake import

100%

Bundle analyzer script

70%

100%

webpack-bundle-analyzer in devDependencies

100%

Named/selective Ramda import

100%

BUNDLE_AUDIT mentions tree shaking

100%

BUNDLE_AUDIT mentions dynamic imports

100%

API Response Time Investigation

Database query and caching optimization

Criteria

Without context

With context

N+1 fix: include author

100%

No per-article user query

100%

Redis cache check

80%

100%

Redis cache store with TTL

80%

100%

Cache key includes userId

100%

Cache TTL is positive integer

100%

Index on articles.author_id

100%

Index on articles.published_at

100%

PERFORMANCE_NOTES explains N+1

100%

PERFORMANCE_NOTES explains cache TTL choice

100%

Repository: supercent-io/skills-template
Commit: c033769

Evaluated: 28 days ago
Agent: Claude Code
Model: Claude Sonnet 4.6

Table of Contents

E-Commerce Dashboard Performance Review Bundle Size Audit and Optimization API Response Time Investigation

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