I don't think I did anything to speed up the installation of Window 11 on my computer. It just came up as a notification from Windows Update, and I accepted it. It seems to manage memory and resources better than Windows 10. I bought my Dell computer in March, 2020. I got a ready-made computer because COVID had slowed shipping of custom computers to about 6 months. Right away, I was disappointed that the performance of the new computer was so balky. I could type half a line before it appeared on the screen. I upgraded RAM to 32 Gb, and that didn't help much. But after I installed Windows 11, the computer ran a lot more smoothly.
Nonetheless, I gave into temptation on Black Friday and bought the computer I should have bought last year. Now I have the fun job of moving to a new computer. The new computer had Windows 10 Pro, but offered me Windows 11 Pro during the setup process. But I can't use my new computer yet. It needs Display Port video cables if I want two monitors, so I have to wait for Amazon to deliver them.

-Joe-