I am new to Mac so forgive the naive question. I have used Windows & Linux for a long time in the past and no matter how slow the system becomes (this actually applies almost only to Windows), the UI is usually snappy if the system is not busy executing multiple background tasks. For example, if I click on a Window or hit Alt-Tab, the switch is almost immediate (unless of course, the application executes some tasks when its window is activated). However, this is not the case with my Mac and a simple click on even the Finder window takes between 500ms to 1000ms to take effect. This is always the case no matter how busy or free my Mac is. Even though it is relatively old (Early 2015), the hardware is quite powerful:
MacBook Pro (Retina, 13-inch) Processor 3.1 GHz Intel Core i7 Memory 16 GB 1867 DDR3 Graphics Intel Iris Graphics 6100 1536 MB
In comparison, my Ubuntu laptop (System 76) is about 3-4 years old, but it is much faster and I rarely feel I have to wait for a second or so before it switches application!
Has this always been the case with Mac, or there is something to configure on my machine?