Testing content and runtime 2 against D3 and eLinux

Test the low end cluster being done as part of task QT3DS-1486 in the environment. Analyse what could be optimised to achieve better performance:

• In the content, any tricks we could use to squeeze more.
• In the runtime, any hotspots to optimise.
• In the Qt 3D, any hotspots to optimise.

Create tasks/subtasks accordingly for these optimisations. For runtime and Qt 3D best contacts are lagocs and e0150566. There might be optimisations already as part of Qt 5.11.1 that might be useful.

Implement found optimisation points as time permits.