If you are talking about Google Search Engines, there are 2-3 things due to which Google takes much more time to scroll. Connectivity and network are the two main problems. If the speed of your network is good, your page will load quickly.
Secondly, it depends upon your device. Whether desktop or mobile, your processor will play a major role in speed, loading and scrolling.
Third, your browser is the main tool in scrolling pages. In Google Chrome if you are facing scrolling problem, you can go to setting and set the smooth scrolling feature.
In Chrome browser's address bar type chrome://flags or about:flags and press enter. It will open a configuration page. In that page enable smooth scrolling.And relaunch chrome again.
That is all.Now you can experience the speed up scrolling in Google Chrome. For better performance, you have to update your browsers timely. If you still have problems with Google Chrome browsers you can contact Google Chrome Forums. They will help you in solving your problem.