Reproduction steps:
1. Open the attached project.
2. Play the 'main' scene.
3. Check notifications in the Console tab.

Actual result:

macOS .NET 3.5:
Operations took 193 ms warming up
Operations took 221 ms on main thread
Operations took 161 ms on non-main thread
Operations took 5436 ms in thread pool

macOS .NET 4.6:
Operations took 111 ms warming up
Operations took 172 ms on main thread
Operations took 95 ms on non-main thread
Operations took 161 ms in thread pool

Windows .NET 3.5:
Operations took 175 ms warming up
Operations took 174 ms on main thread
Operations took 170 ms on non-main thread
Operations took 321 ms in thread pool

Expected result:
- There is most likely room for optimization. (Operations took 5436 ms in thread pool)

Reproduced with:
macOS (.NET 3.5)
5.5.6f1, 5.6.5p2, 2017.1.3p1, 2017.2.1p4, 2017.3.1p1, 2018.1.0b7

Not reproducible with:
macOS (.NET 4.6)
Windows