# LifecycleSubject.PerfMeasureOnStart(int, TimeSpan)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.core/orleans.lifecyclesubject/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.core/orleans.lifecyclesubject/methods/)

[Source](https://github.com/dotnet/orleans/blob/b7a9e3e1c9c54b3cec3a467c5734bf7744541bcf/src/Orleans.Core/Lifecycle/LifecycleSubject.cs#L89-L90)

```csharp
protected virtual void PerfMeasureOnStart(int stage, TimeSpan elapsed)
```

Logs the observed performance of an [LifecycleSubject](/orleans/docs/api/csharp/microsoft.orleans.core/orleans.lifecyclesubject/) call.

### Parameters

- `stage` (`int`): The stage.
- `elapsed` (`TimeSpan`): The period of time which elapsed before [LifecycleSubject](/orleans/docs/api/csharp/microsoft.orleans.core/orleans.lifecyclesubject/) completed once it was initiated.