# OnOperationModeStart()

> Called when stable frame mode becomes the active operation mode. Resets the variance window and applies the framerate bounds read from the AdaptiveFramerate scaler.

## Definition

* **Type:** Method
* **Namespace:** [UnityEngine.AdaptivePerformance](/engine/7000.0/script-reference/unityengine/adaptiveperformance.md)
* **Assembly:** UnityEngine.AdaptivePerformanceModule

```csharp
public void OnOperationModeStart()
```