> All Windows do in that case is to send the cursor image to the GPU and set the registers that specify the plane (cursor) position whenever the mouse moves - n

> All Windows do in that case is to send the cursor image to the GPU and set the registers that specify the plane (cursor) position whenever the mouse moves - no drawing takes place. On the contrary. The modern GPU has so many buffers that its constantly recalculating every pixel with custom code pixel shaders (transparency and everything) every frame, maybe 60 FPS or faster. Yeah, the CPU doesn't do any of that bit-blit stuff anymore. But the GPU does that constantly every frame, over-and-over again to compose modern windows. VRAM is 500GBps for a reason on modern GPUs. In either case, "blanking" the screen and redrawing it is a fundamentally fast operation 30 years ago, let alone today. Today's computers are so much faster that there are layers of custom-programmable parts running on 2 different processors (CPU passing data to GPU over PCIe) every frame. 4GB+ VRAM buffers on the GPU allows the GPU to save off some work of course, but there's an incredible amount of calculations that occur on every pixel of every frame 60 times a second today. -------- In any case, a pure-text, maybe ASCII (or Unicode) window shouldn't be having these issues.