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The three next/image mistakes that quietly wreck your LCP score: missing priority on hero banners, lazy sizes attributes, and no cache directory on self-hosted deploys.
A field guide to diagnosing V8 memory leaks and event loop lag in high-throughput NestJS APIs — measuring lag with perf_hooks, killing RxJS subscription leaks, and offloading CPU work to worker threads.
Fix slow LCP and INP in React + Vite apps with route-level code splitting, manual Rollup chunks, and smarter icon imports. Real config included.