Flutter as a UI framework powers devices and renders animations fast and without jank. Performance is core to Flutter and has been the reason for continuous optimizations and improvements.

However, aside from the framework's actions, the developer/builder of the Flutter app also has a role to play in the performance of Flutter's UI in their apps. They have to collaborate with the framework and not fight it to achieve the best performant UI ever.

In this session, we will go through expert tips that anyone building Flutter must take into account when working with UI code. They are as follows:

* Use widgets instead of functions that return them
* Use "const" keyword where obtainable
* Cache images after they are fetched
* Cache results of computation
* Use Isolates when needed