https://rpalert.dev/blog/Recent content on RPAlert BlogHugoenThu, 16 Apr 2026 00:00:00 +0000https://rpalert.dev/blog/posts/most-lcp-fixes-come-down-to-one-image-2i09/Thu, 16 Apr 2026 00:00:00 +0000https://rpalert.dev/blog/posts/most-lcp-fixes-come-down-to-one-image-2i09/Most LCP issues trace back to one image — a CSS background-image, a missing fetchpriority, or a lazy-loaded hero. Find the LCP element first.https://rpalert.dev/blog/posts/detecting-performance-regressions-right-after-you-deploy-403f/Tue, 14 Apr 2026 00:00:00 +0000https://rpalert.dev/blog/posts/detecting-performance-regressions-right-after-you-deploy-403f/The first 30 minutes after deploy are the cheapest window to catch performance regressions. Here's how to detect them before users notice.https://rpalert.dev/blog/posts/memoization-in-the-react-compiler-era-what-actually-changes-3e6b/Thu, 09 Apr 2026 00:00:00 +0000https://rpalert.dev/blog/posts/memoization-in-the-react-compiler-era-what-actually-changes-3e6b/The React Compiler auto-memoizes re-renders, but it doesn't touch network waterfalls, bundle size, or Long Tasks. Here's what it skips and what you still own.https://rpalert.dev/blog/posts/why-your-app-feels-fast-in-staging-and-slow-in-production-27e6/Tue, 07 Apr 2026 00:00:00 +0000https://rpalert.dev/blog/posts/why-your-app-feels-fast-in-staging-and-slow-in-production-27e6/Staging hides real performance — fast hardware, no third-party scripts, warm caches. Why production is always slower and how to close the gap.https://rpalert.dev/blog/posts/long-tasks-are-quietly-killing-your-react-apps-performance-3487/Thu, 02 Apr 2026 00:00:00 +0000https://rpalert.dev/blog/posts/long-tasks-are-quietly-killing-your-react-apps-performance-3487/Any task blocking the main thread for over 50ms makes your app feel broken. How to find and break up Long Tasks in React.https://rpalert.dev/blog/posts/core-web-vitals-explained-what-they-are-how-to-measure-them-and-why-they-matter-for-react-apps-3f2p/Sat, 28 Mar 2026 00:00:00 +0000https://rpalert.dev/blog/posts/core-web-vitals-explained-what-they-are-how-to-measure-them-and-why-they-matter-for-react-apps-3f2p/LCP, INP, and CLS — what each Core Web Vital measures, how to check them in a React app, and what thresholds actually matter.https://rpalert.dev/blog/posts/monitoring-vs-alerting-react-teams/Fri, 27 Mar 2026 00:00:00 +0000https://rpalert.dev/blog/posts/monitoring-vs-alerting-react-teams/Performance monitoring and real-time alerting are two different jobs. Here's what most React teams are missing.https://rpalert.dev/blog/posts/hello-world/Thu, 26 Mar 2026 00:00:00 +0000https://rpalert.dev/blog/posts/hello-world/Welcome to the official RPAlert blog. We'll be sharing insights on web performance monitoring, Core Web Vitals, and product updates.