Why not let the compiler produce native code on its own?

This produces optimal code that is easy to read and follow .

If the compiler knows that there is only one pointer to a memory block, it can produce better code.

Graph coloring allocators produce efficient code, but their allocation time is high.

A more complex process may involve other programs producing code or data for the build process.

Each step produces a deliverable, either a document, code, or a test report.

However, they cannot then produce faster code and so this can only provide a very limited one step self-improvement.

The back end usually optimizes to produce code that runs faster.

Also, the information given by the language declarations of a type system can be used by a compiler to produce more efficient code.

The simulation engine is a set of routines that are linked to the model in order to produce executable code.