WS_EX_COMPOSITED - 高CPU [英] WS_EX_COMPOSITED - high CPU

问题描述

我在我的应用程序中使用WS_EX_COMPOSITED样式，但它运行CPU到100％，有办法停止我的应用程序绘图一段时间，并恢复只有当我需要？
有些人建议使用睡眠，但是在WndProc什么时候睡觉？

I am using WS_EX_COMPOSITED style in my application but its running the CPU to 100%, is there way to stop my application drawing for a while and to resume only when i need ? Some people are suggesting to use Sleep's but where exactly in WndProc do i put sleeps ?

提前感谢。

推荐答案

不要使用 Sleep 。这是几乎没有问题的解决方案。

Don't use Sleep. It is the solution to almost no problems.

真的， WS_EX_COMPOSITED 可以占用CPU，经验。 Vista和更高的性能影响要小得多。但是，如果你的应用程序是空闲的，那么它不会重画。如果你的CPU是100％，应用程序是空闲的，那么你在你的 WM_PAINT 处理中做错了。你的描述听起来像一个无尽的油漆循环。如果你做正确的事情，这不会发生，即使你使用 WS_EX_COMPOSITED 。

It's true that WS_EX_COMPOSITED can hog CPU but mostly on XP in my experience. There is a much less significant performance hit on Vista and up. However, if your app is idle then it won't be repainting. If your CPU is 100% and the app is idle then you are doing something wrong in your WM_PAINT handling. What you describe sounds like an endless loop of paint cycles. If you do things right, that won't happen, even if you use WS_EX_COMPOSITED.

双向缓冲方式， BeginBufferedPaint 是现代化的方式，在Vista及以上。

As regards the right way to do double buffering, BeginBufferedPaint is the modern way to do this, on Vista and up.

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