However, my recent project (in laptop) & I think my first project in Adobe Premiere Pro CC 2020 is rendering very slow, same is the issue with rendering previews.
Up to Adobe Premiere Pro CC 2019 I didn’t encounter any rendering issues & CPU usage (and in between GPU usage as well) used to be very high (40% - 100%) during rendering (even in laptop, no issues). I have been using Premiere Pro since Adobe Premiere Pro CC 2018 in my PC (not laptop). I recently started working on a new video, editing it in Adobe Premiere Pro.