Performance issues in XAML-based UI development often stem from unnecessary UI rendering and binding errors. Hidden elements remain in the UI tree, impacting performance, while premature bindings cause background errors. To optimize complex list item templates, UI content can be loaded only when needed, and binding errors can be reduced by applying view models at the control level. These improvements enhance efficiency, reduce log clutter, and improve maintainability.
=== Lesson Technique 1: Loading UI content on demand ===
It was discovered that UI controls hidden with '''IsVisible=False''' remain in the UI tree. To improve performance on highly complex item templates, like UBIKTaskItem, rendered repeatedly such as in ListViews, a workaround can be applied to only load the UI content when the '''visibility''' binding condition is met.
=== Lesson Technique 2: Reducing background Binding errors ===
Complex item templates such as UBIKTaskItem were found to produce large numbers of '''errors''' while rendering, likely as bindings are being resolved before the relevant '''viewmodels''' can be loaded by the client. While these '''errors''' are temporary and not visible to the user, the cumulative effect of numerous binding errors raised while rendering items can be felt when navigating to pages with large numbers of items.