Two things come to mind: 1/ carefully rearranging headers in a large C++ product, cutting build time from hours to 30 minutes. Think levelization a la Viega (s

Two things come to mind: 1/ carefully rearranging headers in a large C++ product, cutting build time from hours to 30 minutes. Think levelization a la Viega (see https://www.youtube.com/watch?v=QjFpKJ8Xx78 https://www.youtube.com/watch?v=QjFpKJ8Xx78). 2/ setting up JSP->java->class compilation to detect syntax errors at build time rather than at web server startup, eliminated finding such errors in the field completely.