[andrewguy9]

For normal user behavior you will rarely encounter a problem. But build systems tend to update/create files very quickly. If there was a workload which would break ReadDirectoryChanges, it would be this one.

Reading the code for Realize, he gets the directory watching facilities from https://github.com/fsnotify/fsnotify. That library seems to drop the 'buffer overflow, please reset your assumptions' message. So if it did happen, I don't think the user would have a good experience.

If you do ever depend on ReadDirectoryChanges, you do need to fallback to stat-ing files if you get an overflow. Otherwise, your milage may vary.