UI thread performance (#3713)

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Author: ArshadAriff

docs/Optimize_UI_Thread_Performance.md

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+[Home](..\README.md) > How to Optimize UI Thread Performance?
+
+---
+
+# How to Optimize UI Thread Performance?
+
+## Background information
+
+The UI thread in WPF is responsible for rendering controls and handling user interactions. Heavy computations or complex bindings on the UI thread can lead to sluggish performance and poor user experience.
+
+## Using `Dispatcher.BeginInvoke`
+
+For non-UI-intensive tasks that still need to interact with the UI, use `Dispatcher.BeginInvoke` to move tasks off the UI thread without blocking it:
+
+```csharp
+// Execute this in the background without freezing the UI
+Dispatcher.BeginInvoke((Action)(() =>
+{
+    // Update UI elements here
+}));
+```
+
+## Avoiding Complex Bindings
+
+Complex bindings, especially with large data sets, can slow down the UI. Consider simplifying bindings, reducing converters, or using `INotifyPropertyChanged` with view models to optimize data flow.
+
+```xaml
+<!-- Avoid multi-level bindings when possible -->
+<TextBlock Text="{Binding User.Name}" />
+```
+
+> [!NOTE]
+> Always test performance impacts when using nested or complex bindings.
+
+## Use `VirtualizingStackPanel` for Large Lists
+
+For large collections, use `VirtualizingStackPanel` to only create visuals for items in view:
+
+```xaml
+<ListBox VirtualizingStackPanel.IsVirtualizing="True" />
+```
+
+This reduces memory usage and improves scrolling performance in lists.
+
+