to get (much) better runtime performance it is using "Ahead Of Time" instead of "Just In Time"
compiling to byte code representation, an approach typical for "native" mobile apps anyway.
Enabling Hermes · React Native
Chain React 2019: Hermes Engine Announcement - YouTube
the key advantage is speed, achieved by doing `Ahead Of Time` compiling to bytecode
While the presenter claims that Node.js (server side) and browsers are not objectives,
this approach could be used for server side apps and it could be beneficial in particular for ‘serverless’ (cloud functions, i.e. AWS Lambda) deployments, as well as for embedded IoT.
Since V8 JS engine is open source, it could be "forked" to do similar.