# BeginSample

> Adds a command to begin profile sampling.

## Definition

* **Type:** Method
* **Namespace:** [UnityEngine.Rendering](/engine/6000.0/script-reference/unityengine/rendering.md)
* **Assembly:** UnityEngine.CoreModule

## BeginSample(string)

Adds a command to begin profile sampling.

```csharp
public void BeginSample(string name)
```

### Parameters

**** (\[string]\(https\://learn.microsoft.com/dotnet/api/system.string)): Name of the profile information used for sampling.

### Remarks

Schedules a performance profiling sample to begin when the Command Buffer reaches this point. This is useful for measuring CPU and GPU time spent by one or more commands in the Command Buffer.

A profiling sample that starts with BeginSample must always end with a call to [CommandBuffer.EndSample](/engine/6000.0/script-reference/unityengine/rendering/commandbuffer/endsample.md) with the same argument.

## BeginSample(CustomSampler)

Adds a command to begin profile sampling.

```csharp
public void BeginSample(CustomSampler sampler)
```

### Parameters

**** (\[CustomSampler]\(/engine/6000.0/script-reference/unityengine/profiling/customsampler)): The CustomSampler that the CommandBuffer uses for sampling.

### Remarks

Schedules a performance profiling sample to begin when the Command Buffer reaches this point. This is useful for measuring CPU and GPU time spent by one or more commands in the Command Buffer.

A profiling sample that starts with BeginSample must always end with a call to [CommandBuffer.EndSample](/engine/6000.0/script-reference/unityengine/rendering/commandbuffer/endsample.md) with the same argument.

## BeginSample(ProfilerMarker)

Adds a command to begin profile sampling.

```csharp
[Conditional("ENABLE_PROFILER")]
public void BeginSample(ProfilerMarker marker)
```

### Parameters

**** (\[ProfilerMarker]\(/engine/6000.0/script-reference/unity/profiling/profilermarker)): The ProfilerMarker that the CommandBuffer uses for sampling.

### Remarks

Schedules a performance profiling sample to begin when the Command Buffer reaches this point. This is useful for measuring CPU and GPU time spent by one or more commands in the Command Buffer.

A profiling sample that starts with BeginSample must always end with a call to [CommandBuffer.EndSample](/engine/6000.0/script-reference/unityengine/rendering/commandbuffer/endsample.md) with the same argument.