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Frontend interview articles

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2 articles

Performance APIs: Web Vitals, Long Tasks, and Real Metrics

Understand the browser APIs behind performance measurement: PerformanceObserver, long tasks, navigation timing, and capturing Web Vitals in real apps.

#Monitoring#Web Platform

Mar 01, 2026Practice

Performance2 min read

Measuring Performance: Lighthouse vs RUM (and Setting Budgets)

How to measure performance like a pro: lab vs field metrics, what to trust, and how to set practical budgets to prevent regressions.

#Monitoring#Interviews

Mar 01, 2026Practice