A tactical checklist to reduce bundle weight, improve startup time, and smooth scrolling in production React Native builds.
React Native apps can feel instant, but only if you optimize early. Use this playbook before launch to lock in speed and stability.
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Audit the package list and drop anything not used in production. Every dependency adds size and startup cost.
Hermes improves startup time and reduces memory usage. Turn it on and verify production builds use the same engine.
Compress images and serve multiple sizes. Use vector assets when possible and avoid giant PNGs in the bundle.
Use memoization and shouldComponentUpdate where needed. Large lists should be virtualized and chunked.
Use Flipper or React DevTools to identify long tasks and reduce expensive calculations on the main thread.
Batch native calls and avoid unnecessary prop updates. Prefer native modules for heavy work.
Measure transition durations and simplify screens with heavy layouts. Preload critical data before navigation.
Debug builds are slower. Always validate performance on release builds and real devices.
Monitor startup time, crash rate, and scroll jank. Use telemetry to catch regressions quickly.
Performance is a product feature. Treat it like one and your app will feel premium.
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Quick answers to the most common questions.
A focused MVP with only the core customer flow, so you can launch fast and learn.
Basic apps take 4 to 6 weeks. Bigger apps with payments or dashboards take longer.
It should. Ask for performance testing on budget Android devices before launch.
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