[JulienSchmidt]

parsed (+compressed), not compiled.

Parsing is unavoidable, regardless if the code is interpreted or compiled. This proposal seems to further compress the AST somehow.

Basically the idea is to already preprocess the text source, so that the client can skip two steps on execution: lexical analysis and the parsing of the text source resulting in the AST. The post explains why the authors believe that this is a good idea.