Does superfetch slow down computer?

Service Host SuperFetch is a Windows process that improves hard drive performance, but sometimes cause slowdown with an SSD.

What is the use of Superfetch in Windows 10?

Superfetch is a Windows service that is intended to make your applications launch faster and improve your system respond speed. It does so by pre-loading programs you frequently use into RAM so that they don’t have to be called from the hard drive every time you run them.