That's pretty much the whole basis of Domain Driven Design. The core message is to get to an Ubiquitous Language which is the formalization of the business jargon (pretty much a glossary). From which the code can then be derived naturally.
Optimization is dependent on the technical aspect of the implementation. Ultimately, it is going to be a computer that's going to execute the program and it has its own constraints. Reconciling the domain and the execution platform is where the programmer expertise comes in.
