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Stop 23 · Interview PreparationTechnical · 3/8

Performance optimization

Part of the Frontend Developer Roadmap

In short

Being able to talk through how you'd diagnose and fix a slow page — the classic 'this page is slow, what would you do?' interview question.

How to learn this

  1. 1Prepare a structured answer: measure first with Lighthouse/DevTools, then optimize based on data.
  2. 2Have 2-3 real examples ready from your own projects where you improved performance.
  3. 3Practice explaining the difference between perceived and actual performance.

More technical at this stop

HTML, CSS, JavaScript, React, TypeScriptBrowser internalsSecurity (XSS, CSRF)AccessibilityREST APIsHTTP methods and status codesSystem design (frontend)

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