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But now Facebook mobile app is a different tech. It's ReactNative, not Obj-C, right?

• jaxondu 9y ago
  React Native under the hood uses Obj-C to bridge to native Cocoa frameworks. For example when you uses a <View> tag in JavaScript, it ends up calling iOS UIView.
  • pavlakoos 9y ago
    Still, it's not the very same tech. Especially in this discussion, where we are talking about apps performance and languages, which need to get under the hood instead of talking directly with the engine, are presented as "worse".
• LeoNatan25 9y ago
  Only a tiny fraction of the Facebook app is actually RN. Messenger uses none of it for performance reasons.
  • pavlakoos 9y ago
    Huh? Isn't Facebook advertising their main app as no.1 use case of ReactNative?
    • LeoNatan25 9y ago
      Advertising is one thing, reality is different. The main, performant views are native. Some of the esoteric stuff is RN.