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RN is quite inefficient and perf issues will not be obvious if using high end devices. Which is why Meta is working on Hermes:

https://engineering.fb.com/2019/07/12/android/hermes/

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That’s from almost 3 years ago. RN had changed a lot since then (and Hermes is included by default now)

https://reactnative.dev/architecture/bundled-hermes

Hermes is already enabled by default in rn.

If you can get away with it, it's not a bad option. But it's still early days. If you run into compatibility problems or bugs with libraries being used, you could be in trouble.

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