Map meta formats to binary for efficient reading

[bvssvni]

An idea is to automatically generate a binary format from a meta language. The binary format could be used to load data efficiently.

Discussed this on IRC and was pointed to https://github.com/wc-duck/datalibrary

[bvssvni]

An idea is to make meta data converting generic, such that you can process both &[MetaData] and the binary format directly. This means the binary format must contain the source to report errors.