It was such a useful class. ㅎㅎ The part about breaking through the paging limit, which I usually worry about, was really good. I was impressed by how you handled more diverse situations than I had thought and how you optimized to the limit. After breaking through the paging limit, OSIV was also included in the lecture, and I thought, 'You've gathered the best API performance optimization tips.' ㅎㅎ It was really helpful! I'll have to read the lecture contents again along with the book and organize them well. I remember it better if I write it down. ㅎㅎ Thank you, Younghan!