Optimizing Manus-Generated Code for Performance

Manus generates code optimized for task completion, not for performance. It may generate O(n²) solutions where better alternatives exist, create unnecessary intermediate files, or leave development-only tooling installed in production environments

Profile and review Manus-generated code for performance before deploying to production. Remove development dependencies and debug tooling. Test with realistic data volumes that Manus may not have had during its autonomous execution

Before optimizing, measure. Use your browser's Lighthouse audit to get a baseline score. Check Core Web Vitals (LCP, FID, CLS) — these directly affect your Google ranking. Use the Performance tab in DevTools to identify which components take the longest to render. For server-side performance, add timing logs to API routes to find slow endpoints.

The fastest way to improve performance: optimize and lazy-load images, enable compression on your server, remove unused CSS and JavaScript, implement code splitting so users only download code for the page they're viewing, and add proper caching headers for static assets. These changes alone can cut load times significantly.

If your Manus app uses a database, slow queries are often the biggest performance bottleneck. Add indexes on columns you filter or sort by. Use SELECT to fetch only the columns you need instead of SELECT *. Implement pagination for lists — loading 10,000 rows at once will always be slow. Consider adding a caching layer for data that doesn't change frequently.