Activa o Desactiva la Torch con lag porque no es codigo nativo

AndroidCamTorch.cs

using UnityEngine;

// AndroidCamTorch.Activar()
// AndroidCamTorch.Desactivar()

public class AndroidCamTorch
{
#if UNITY_ANDROID
    static AndroidJavaClass cameraClassInternal;
    static AndroidJavaObject cameraInstanceInternal, cameraParametersInternal;

    static AndroidJavaClass cameraClass
    {
        get
        {
            if (cameraClassInternal == null)
            {
                WebCamDevice[] devices = WebCamTexture.devices;
                cameraClassInternal = new AndroidJavaClass("android.hardware.Camera");
            }
            if (cameraClassInternal == null)
            {
                Debug.LogError("No se encuentra la Cam API de Android");
                return null;
            }
            else return cameraClassInternal;
        }
    }

    static AndroidJavaObject cameraInstance
    {
        get
        {
            if (cameraInstanceInternal == null)
            {
                cameraInstanceInternal = cameraClass.CallStatic<AndroidJavaObject>("open", 0);
            }
            if (cameraInstanceInternal == null)
            {
                Debug.LogError("No se pudo abrir camara");
                return null;
            }
            else return cameraInstanceInternal;
        }
    }

    static AndroidJavaObject cameraParameters
    {
        get
        {
            if (cameraParametersInternal == null)
            {
                cameraParametersInternal = cameraInstance.Call<AndroidJavaObject>("getParameters");
            }
            if (cameraParametersInternal == null)
            {
                Debug.LogError("No se pudieron getear los parametros");
                return null;
            }
            else return cameraParametersInternal;
        }
    }
#endif

    public static void Activar()
    {
#if UNITY_ANDROID && !UNITY_EDITOR
        cameraParameters.Call("setFlashMode", "torch");
        cameraInstance.Call("setParameters", cameraParameters);
        cameraInstance.Call("startPreview");
#endif
    }
    public static void Desactivar()
    {
#if UNITY_ANDROID && !UNITY_EDITOR
        cameraParameters.Call("setFlashMode", "off");
        cameraInstance.Call("setParameters", cameraParameters);
        cameraInstance.Call("stopPreview");
#endif
    }
}