App state
React Performance Libraries and Tools
Apr 20, 2026 · 5 min read
Most slowness is extra renders and huge lists. Virtualize first, then split the bundle. Libraries help when the profiler already named the cost.
Measure, then virtualize
React Profiler and why-did-you-render style tools show wasted renders. react-window and TanStack Virtual cut DOM for long lists.
Do not memo everything. Memo the lists and charts the profiler flags.
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Browse Performance and Virtualization on React Library Hub. Sort by downloads and check TypeScript plus SSR notes.
react performancereact virtualizationreact-windowreact bundle sizereact profilerreact lazy loadtanstack virtualbest react performancereact memo librariesreact performance 2026
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