Windows Standalone build uses twice the RAM on Vulkan than on D3D11. Scene with Main Camera and Directional Light (newly created) uses ~60MB when built for D3D11 vs ~110MB when built for Vulkan.

Reproduction steps:
1. Create new project
2. Set graphics API for Windows to Direct3D11
3. Build and run
4. Observe the RAM usage in Task Manager
5. Close the player
6. Set graphics API for Windows to Vulkan
7. Build and run
8. Observe the RAM usage in Task Manager

Reproduced on: 5.6.0a1, 5.6.2p1, 2017.1.0b9, 2017.1.0f2, 2017.2.0b2