MapFileStats  v1.4 is now available, this version provides a lot more details about where the bytes in your executables come from. It also features improved visualization and performance.
The main change in this version is the ability to drill-down into units, and see more details about the size of classes, methods, functions and meta-data (VMT tables). Bar Charts have also been added, to allow visually gauging the relative sizes.
Finally, the file scanner now uses the enhanced implementation from DWScript , which can be up to ten times faster on busy drives (more details in a future article).
You can get this version from the MapFileStats downloads  page.