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75 articles · page 2 of 9
High-signal web performance interview questions with crisp answers: Core Web Vitals, caching, rendering, images, fonts, JS cost, and debugging.
How to measure performance like a pro: lab vs field metrics, what to trust, and how to set practical budgets to prevent regressions.
How Next.js (App Router) affects performance: server components, client boundaries, streaming, caching, and avoiding accidental JS bloat.
How third-party scripts hurt performance, how to measure the damage, and pragmatic strategies: defer, isolate, audit, and remove.
A practical mental model of the browser rendering pipeline and how common coding patterns cause forced reflow, jank, and slow interactions.
A practical guide to cache-control, ETag, immutable assets, and CDN strategy to reduce TTFB and speed up repeat visits.
How JS hurts INP and load performance, how to find long tasks, and practical patterns to reduce client JS in modern apps (especially Next.js).
How fonts hurt LCP/CLS, when to preload, how font-display works, and practical strategies to avoid layout shift with good typography.
How to ship fast images: responsive sizes, AVIF/WebP, LCP hero strategy, lazy loading, and when preloading helps (or hurts).