"Since there is a callback function of this type, it is not efficient to do it by saying, "I have this object and set this value." If you define it as a whole, you need so much memory, because it is such a layout, can you not feel like it? So we decided to use the Snapshot features that V8 provided to make it more efficient. By the way, in pure V8,... See more

V8 has a snapshot feature that serializes the generated Isolate Context state and deserialize it to reduce overhead and accelerates the generation of Isolate Context.