The attachment includes two projects. They are the same except that one is on 4.23 and the other is on 4.22.
1.Open those projects.
You will see that the 4.23 version cost twice time than 4.22.
A licensee upgraded their engine from 4.22 to 4.23 and encountered this issue and they daily work has been affected.
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-80218 in the post.