📰 Dev.to · nosyos

Streaming SSR sounds like an obvious win. Instead of waiting for all server-side work to finish...

A Next.js app migrated from Pages Router to App Router. RSC throughout, use client pushed to the...

There's a window between when a Next.js page finishes painting and when users can actually interact...

A Lighthouse 95 on a marketing page. CrUX showing 68% of real users experiencing "Poor" LCP. Both...

CLS is the only Core Web Vital that tends to get worse as a product matures. Every component you...

I once spent an afternoon cutting a click handler from 80ms down to 18ms. Clean, fast, properly...

In March 2024, Google replaced First Input Delay with Interaction to Next Paint as an official Core...

A team spends a sprint optimizing LCP. Numbers improve. Six months later the app is slower than...

Performance work stalls not because engineers don't care, but because the business case is vague....

Testing on Fast Wi-Fi Is Not a Performance Test Tags: #react #performance #webdev...

You've probably already tried something. Added useMemo in a few places. Run Lighthouse. Checked the...

I once audited a page where nearly 40% of the main thread blocking time came from a tag manager...

Three hours after a deploy, someone posts a screenshot in Slack. One-star review. App "takes forever...

React Compiler 1.0 went stable in October 2025. Half the tutorials I saw declared useMemo dead. It's...

A Lighthouse score of 95 on staging doesn't mean your users will see that. It means your machine, on...

Here's something that doesn't get talked about enough: your React app can have great LCP and FCP...

If you've seen the term "Core Web Vitals" and kept scrolling, this article is for you. It's not just...