Visual Studio 2019 release. High CPU usage

I had the same problem as you today. Fresh Visual Studio 2019 installation and my CPU was constantly on around 30%. I noticed that Visual Studio is indexing files. On the left bottom corner you can click on an animated icon to see what is going on. After it finished this process my CPU went down to 1-2%.

I had this problem today with VS 2019 version 16.2.3. VS had been running for several hours and was not reporting any indexing activity. High CPU usage and high memory usage.

I resolved it by deleting the files in my Windows temp folder (%TEMP%) as per Chris Hasick's answer here : https://developercommunity.visualstudio.com/content/problem/516141/very-hight-cpu-usage-by-visual-studio-2019.html

After deletion of the temp files the CPU usage dropped from 50-65% to 0.3%