Performance optimization strategies often used by iOS

1. Manage memory with ARC
2. Using the reuse mechanism for UITableView
3, UIView and its sub-class settings opaque=true
4, the main process is used to draw the UI, so do not block
5, cautious use xib, because xib when creating Uiviewcontroller. Will import all the content on Xib into memory
6. Select the correct set
Arrays: A list of ordered values. With index high-speed lookup, by value lookup slow, insert/delete operation slow.

Dictionaries: Store key/value pairs. Find at index speed.
Sets: Unordered list of values.

High-speed search by value, Insert/delete fast.
7. Enable gzip compression
iOS has already supported gzip compression by default

8. Delay Creation

Performance optimization strategies often used by iOS