How to reproduce:
1. Add the attached project to your preferred workspace and open it
2. Connect it to Perforce or Plastic SCM
3. Submit all of the materials in the "Folder 2" folder
4. Select all of them at once and move them to the "Folder 1" folder
5. Observe the time it takes to move the materials

Expected result: moving multiple files is fast both with VCS on and off (1-10sec)
Actual result: moving multiple files with VCS on is way slower (1000 materials took around 1-2sec to move with no VCS on and 06:30 minutes with Perforce enabled)

Reproduced in: 2020.1.0a18, 2019.3.0f4, 2019.2.16f1, 2018.4.15f1, 2017.4.36f1