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Roadmap to becoming a developer in 2022
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developer-roadmap/src/data/best-practices/frontend-performance/content/analyze-js-for-perf-issues.md

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JavaScript Performance

Check for performance problems in your JavaScript files (and CSS too)

JavaScript complexity can slow down runtime performance. Identifying these possible issues are essential to offer the smoothest user experience.

Use the Timeline tool in the Chrome Developer Tool to evaluate scripts events and found the one that may take too much time.