In 2010, it was my first client project. Our architect was not from iOS background, we had editable pdfs in our app. Those were pretty rich pdfs with inline HD images. iPads that time were not too fast and couldn't handle big gb pdf loaded into memory. App would crash randomly running out of memory. We fixed it by paginating pdf, it wasn't out of the world but considering it was my first mobile project and no one to guide, I thought it was pretty cool what we did there