Code changes for https://github.com/icy-arctic-fox/spectator/issues/47 caused a drastic increase in compilation times.
This improves compilation times by splitting concerns for arguments.
In one case, arguments are used for matching.
In the other, arguments are captured for comparison.
The second case has been moved to a FormalArguments class.
Theoretically, this reduces the complexity and combinations the compiler might be iterating.