The size of the file is a red herring. Has the work been done to analyze and test the subroutines? How many lines are intricate logic, and how many are embed

The size of the file is a red herring. Has the work been done to analyze and test the subroutines? How many lines are intricate logic, and how many are embedded data? How prevalent are references to global variables across subroutines? Are the global variables used as constants? How much is new code, and how much is code that has produced robust results for years?