[joshum97]

Here’s the relevant section: > In most cases, React Native will use JavaScriptCore, the JavaScript engine that powers Safari. Note that on iOS, JavaScriptCore does not use JIT due to the absence of writable executable memory in iOS apps.

[kiliancs]

Since recently, it's possible to use Hermes https://reactnative.dev/blog/2021/03/12/version-0.64

[whizzter]

iirc the Hermes has AOT'd bytecode but not real native execution, from what I read they couldn't get the performance up enough to offset the size cost vs their bytecode and for many regular React-native apps absolute performance isn't as important as not being waaay too bloated.