Steps to reproduce:
1. Download and open the latest attached project
2. Open the profiler window
3. Press play

Expected result: steady performance impact
Actual result: time needed to instantiate or add a component increases each time the script is run, even if you delete objects on the same frame

Reproduced on 5.2.3f1. 5.3.6f1, 5.3.7p2, 5.4.3p1, 5.5.0f3, 5.6.0a5

Notes:
-Currently the project is set to create 100 objects every frame. This can also be reproduced by lowering the number(to even 1): the time needed rises slower, but is still gets to a point where performance issues are evident.