Jobs letter

I have always said if there ever came a day when I could no longer meet my duties and expectations as Apple’s CEO, I would be the first to let you know.

Unfortunately, that day has come.

I hereby resign as CEO of Apple. I would like to serve, if the Board sees fit, as Chairman of the Board, director and Apple employee.

As far as my successor goes, I strongly recommend that we execute our succession plan and name Tim Cook as CEO of Apple.

I believe Apple’s brightest and most innovative days are ahead of it. And I look forward to watching and contributing to its success in a new role.

I have made some of the best friends of my life at Apple, and I thank you all for the many years of being able to work alongside you.

Steve


### Unity Jobs 问题解决方案 Unity Jobs System 是 Unity 提供的一种多线程处理机制,旨在帮助开发者充分利用多核 CPU 的计算能力,从而提升游戏或应用的性能。尤其在处理大量重复性任务(如物理模拟、动画更新、AI 行为逻辑等)时,Jobs System 可以显著减少主线程的压力,提高帧率稳定性。 #### 使用 Unity Jobs 的基本流程 1. **定义 Job 结构体** 需要实现 `IJob` 或其子接口(如 `IJobParallelForTransform`、`IJobFor` 等),根据任务类型选择合适的接口。 示例代码如下: ```csharp using Unity.Jobs; using UnityEngine; using UnityEngine.Jobs; public struct MovementJob : IJobParallelForTransform { public float moveSpeed; public float topBound; public float bottomBound; public float deltaTime; public void Execute(int index, TransformAccess transform) { Vector3 pos = transform.position; pos += moveSpeed * deltaTime * (transform.rotation * new Vector3(0f, 0f, 1f)); if (pos.z < bottomBound) pos.z = topBound; transform.position = pos; } } ``` 2. **调度 Job 并等待完成** 在 MonoBehaviour 中调用 `Schedule` 方法来启动 Job,并通过 `Complete()` 等待其执行完毕。 ```csharp private void Update() { MovementJob movementJob = new MovementJob { moveSpeed = 5f, topBound = 10f, bottomBound = -10f, deltaTime = Time.deltaTime }; JobHandle handle = movementJob.Schedule(transforms.Length, 64); handle.Complete(); // 如果需要同步回主线程的数据,可以在这里处理 } ``` 3. **使用 Burst 编译器优化** Unity 提供了 Burst 编译器,能够将 C# Job
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