Making React Native Fast & Lean

on YouTube ↗30m

" summary

Concrete wins and methods: measure app startup time memory and UI responsiveness and set a target like a 20% improvement threshold then profile with sampling and marker profilers (Apple Instruments Chrome devtools) and run regression tests on a system like ScanLab. Practical fixes include pre-encoding bundles to avoid a quarter-second startup gain, caching preparse and bytecode to disk, batching and native-to-VM object conversion across the bridge, and shipping a modified JavaScriptCore VM plus random‑access modules to defer loading.

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" chapters (4)

1. 0:00Start
2. 2:38React Native
3. 7:55Performance
4. 26:52Random Access Bundles

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