Positive to negative ratio

Positive to negative ratio

The issue with compiling is when you have to compile many individual .c files, each of which has the same set of includes. It makes sense to cache that information so you don't have to perform the same expensive file checks again for each .c file. When you get into the test and edit steps of the loop, you can safely flush the cache. It's going to be a really long time before you need to look that information up again, and the cache will repopulate as soon as you compile one file.