Application.backgroundLoadingPriority

描述

后台加载线程的优先级。

可用于控制异步加载数据所需的时间以及在后台加载时对游戏的性能影响。

Asynchronous load functions that load objects (Resources.LoadAsync, AssetBundle.LoadAssetAsync, AssetBundle.LoadAllAssetAsync), scenes (Application.LoadLevelAsync, Application.LoadLevelAdditiveAsync) do data read and deserealization on a separate background loading thread and object integration on a main thread. Integration depends on an object type and for textures, meshes means uploading data to the GPU, audio clips prepare data for playing.

To avoid hiccups we limit integration time on a main thread depending on backgroundLoadingPriority value:
- ThreadPriority.Low - 2ms;
- ThreadPriority.BelowNormal - 4ms;
- ThreadPriority.Normal - 10ms;
- ThreadPriority.High - 50ms.
This is a maximum time all asynchronous operations can spend within a single frame on a main thread.

后台加载线程直接使用 backgroundLoadingPriority。

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    void Example() {
        Application.backgroundLoadingPriority = ThreadPriority.High;
        Application.backgroundLoadingPriority = ThreadPriority.Low;
    }
}

另请参阅：ThreadPriority 枚举、AsyncOperation.priority。