通过-vulkan -sm5启动
每次操作界面可以肉眼注意到slate的界面出现模糊然后卡顿2s后变清晰
经过定位发现是卡在swapchain的重建上
关闭cvar r.vulkan.keepswapchain后立马好转
怀疑是驱动问题
Vulkan Spec这么说>
oldSwapchain is VK_NULL_HANDLE, or the existing non-retired swapchain currently associated with surface. Providing a valid oldSwapchain **may** aid in the resource reuse, and also allows the application to still present any images that are already acquired from it.
看起来是个没啥用的优化，主要是驱动可能会帮忙处理旧交换链的销毁和同步。 但是这里直接WaitGPUIdle应该也没啥问题