Add memory profiling. Use a sync.Pool for lexer. Add benchmark numbers before and after using sync.Pool. Simplify assignUids only.

Assign uids for xids over the network. Convert NQuads to Edges using the assigned uids, and then apply these as mutations over the network.

Switch dirtylist with dirtymap, because list causes a merge explosion, when the same posting list gets multiple updates.

Real world use cases. Allow for dots in names. Handle backspace. Run automatic mutation merging. Load multiple rdf gzips, etc.