What exactly is the React Compiler, and how does it improve performance in real-world apps? In this lightning talk, Mykyta Roilian, Engineering Manager at LeanDNA, takes you on a deep dive into how the React Compiler optimizes things like `useMemo`, `useCallback`, memoized children, fallback props, and more. He also shares insights from testing the compiler in real-world-like scenarios—measuring bundle size, load speed, and framework-specific differences with Webpack, Vite, and Next.js. If you’re curious about the future of React performance, this is the talk to watch. #ReactCompiler #ReactPerformance #MykytaRoilian #FrontendNation #FEN2025 #React #WebDev Cut through the complexity. Let the compiler do the work. 💻 Read our blog: https://frontendnation.com/blog 🎟️ Sign up for Frontend Nation 2026 to stay updated: https://frontendnation.com/ 💜 Special thanks to all our event sponsors for 2025: Diamond Sponsors AG Grid: https://www.ag-grid.com/charts/?utm_source=frontend-nation&utm_medium=logo&utm_campaign=frontend-nation-sponsorship-2025 BitterBrains: https://bitterbrains.com/ Vue School: https://vueschool.io/ Certificates.dev: https://certificates.dev/ InstantDev: https://instantdev.io/ Platinum Sponsors Cypress: https://www.cypress.io/ Sentry: https://sentry.io/signup/?utm_source=event&utm_medium=sponsored-event&utm_campaign=general-fy26q2-evergreen&utm_content=signup-frontendnation2025-signup JavaScript Cert: https://certificates.dev/javascript Vue.js Cert: https://certificates.dev/vuejs/ Angular Cert: https://certificates.dev/angular React Cert: https://certificates.dev/react Nuxt Cert: https://certificates.dev/nuxt TypeScript Cert: https://certificates.dev/typescript Agorify: https://agorify.com/ Gold Sponsors Mastering Nuxt: https://masteringnuxt.com/ Mastering Pinia: https://masteringpinia.com/ LevelUp DX: https://levelupdx.com/