核心数据迁移真的很慢，为什么会发生这种情况？

I'm developing a desktop Mac OS X App that saves its very simple data into SQLite with Core Data and a companion mobile App for iPhone that simply needs to read data from the desktop App. Although they share the same Managed Object Model when I load the SQLite database on the mobile app the data takes several seconds to migrate the data. I really would like to avoid this long wait as it appears linearly related to the size of the SQLite file. I'm developing a desktop Mac OS X App that save