The Accelerated scrolling uses the so-called TouchScrollExtender widget from our code. As the article states, it is recommended for use only on mobile devices, and nowadays scrolling there works great, so I would advise that you do not use this mode, because it does not offer any advantages over the built-in touch devices' capabilities. It was created ages ago when this was not the case.
That being said, what it does is modify the scrollTop and scrollLeft properties of the DOM element, so there shouldn't be a significant difference.
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