I am using Ubuntu for two years now, for me it is faster than windows. To have more speed what’s next!?

Lubuntu? Arch?

More ram? Better cpu? :p

Lightweight Desktop and compile your own kernel specific to your machine’s hardware rather using the generic one that came with your distro.

LfS

Update to 18.04 is clearly not a way to make it faster 😅

Learned it in the hard way

Bah.
Write a memory manager, HAL, and process scheduler into each one of your programs. Then run them straight off the hardware. Who needs an OS when you can just build it into your program, am I right? Ultimate customisability.