Microsoft optimizes display mode to make Windows 7 faster

        Many people have installed the Windows 7 RC version, and Windows 7 runs faster than the Vista system. What is the reason for Windows 7 to speed up? AnandTech wrote that the speed of Windows 7 vs. Vista is mainly because Microsoft has given the task of rendering multiple windows and interface thumbnails to the graphics card while minimizing the burden on the CPU and memory system. WDDM 1.1 (windows display driver model) itself is not unique, but Microsoft is now moving texture content from system memory to graphics memory, so Windows memory consumption will be reduced a lot, the extreme situation may be reduced by hundreds of MB.

In addition, Microsoft modified the GDI (Graphics Device Interface) interface without changing the driver. When a local window texture is required, the GDI stack is locked so that only one GDI application can access it at a time. If the GDI stack is rebuilt, the lock status is removed. If multiple GDI applications initiate commands at the same time, it may cause problems during the graphics card phase.

So, even with the multi-window thumbnail switching effect, computers with relatively poor performance can achieve fast multi-window switching in the taskbar.