Opening many small files. That's a design decision by the way - opening a file on NTFS involves a whole bunch of stuff like letting "filters" to be injected bet

Opening many small files. That's a design decision by the way - opening a file on NTFS involves a whole bunch of stuff like letting "filters" to be injected between the program and the OS. This is what makes virus scanners and on-demand cloud storage like OneDrive work. It's a good model for some use cases (eg. above), and not as good for others (compiling C++ projects).