I took a debug trace from Earthbound of loading the status screen, and analyzed it.
The sorted-regions.txt file here is a list of routines sorted by the amount of time they took overall.
The *.log files contain the number of times each instruction was executed in the most time consuming routines,
as well as the amount of time spent and the average time spent per.
This should be used to get an idea of which functions to optimize and where, in order to speed up VWF rendering.