Kar

Kar started this conversation 3 days ago.

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web-development

How do Flutter and React Native compare in startup time, smoothness, and memory usage in 2025?

Evaluates cold/warm startup performance, animation smoothness, and memory profile in cross-platform mobile apps.

Kar

Posted 3 days ago

• Flutter outperforms: cold startup ~1.2s, warm ~85ms; consistently delivers 60–120 fps animation; memory use lower due to Impeller engine and native compilation. • React Native improved with Bridgeless/Fabric architecture, but still lags: cold start ~1.4–1.6s, UI may dip to ~50fps under heavy load; memory overhead higher.

Tags: flutter, react-native, performance, startup-time, ui, memory