On MacBook Pro 2017 Slowness

I have 13' with touch bar. It's slow at times. It's mostly visible when switching between virtual desktops or doing Expose effect. This frame skipping really kills the experience of a fast PC, especially if you switched from a decent Windows 10 machine.

I was suspecting it's because Intel Iris video card. Then I decided to test other MacBooks. I tried MacBook Pro 2017 15', iMac, Mac Pro. Guess what. they all are slow. They all skip frames on Expose and virtual desktops switching.

It's surely not a hardware limitation but somehow a software one. Was it the case in Pre-Sierra MACs?