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Re:Hermes – A small JavaScript engine optimized for running ... by c-smile on Thursday July 11, 2019 @03:34PM (#20414876)
Not clear what version of JS spec it supports.

And what are these "optimizations for running React Native on Android". Just reducing startup/boot time or what?

Re:Hermes – A small JavaScript engine optimized for running ... by janic on Thursday July 11, 2019 @05:21PM (#20415972)
The VM doesn't run JS directly, just bytecode so the version of the spec supported doesn't matter much. JS can be run through babel before going through the Hermes compiler.
Re:Hermes – A small JavaScript engine optimized for running ... by brainee on Thursday July 11, 2019 @11:13PM (#20417794)
wonderful