# codeOptimizationChanged

> This event triggers whenever the CompilationPipeline.codeOptimization property changes between Debug and Release modes.

## Definition

* **Type:** Event
* **Namespace:** [UnityEditor.Compilation](/engine/6000.6/script-reference/unityeditor/compilation.md)
* **Assembly:** UnityEditor.CoreModule

```csharp
public static event Action<CodeOptimization> codeOptimizationChanged
```