Thanks for this, there are many small tasks to be solved with this ticket:

1. Have a separate macro for the inspector (now it is the same as NS_PROFILE)
2. The inspector should consume 0 memory if it is not enabled at runtime (we don't have ways to disabled it on Unity and Unreal, only the C++ SDK)
3. Integration API should offer a way to release all internal memory to the point after the invocation of Init
4. Analyze memory consumed by the reflection, it seems it is more than expected and find a way to free it as much as possible before shutdown.

A few improvements added in r11039.

These are the number I have right now (important you should at least measure this invoking UI::DisableInspector before UI::Init(), but in general you shouldn't release apps in profile configuration).

Uninstalling everything from IntegrationAPI (removing providers, removing resource dictionary), before UI::Shutdown() we have:
[pre]
= 1.054.854 bytes =
[/pre]

This memory mostly belongs to
[pre]
= Boxing 51 Kb =
= Symbols 184 Kb =
= Factory 34 Kb =
= Reflection 761 Kb =
[/pre]

Reflection + Symbols cannot be unloaded, at least without heavy modifications that we cannot apply on 3.1.

Boxing and Factory could be unloaded, but probably not in 3.1 because I think we need a better API for Init and Shutdown
Symbols could be optimized in general to take half that memory (we need to improve our reflection macros for Dependency Properties in C++)
Reflection can be optimized also, and we are working on it, but this is not happening soon as it is a huge breaking change.

Thank you @jsantos for the work and thorough answer. Feel free to close this ticket, once we're able to get back to that topic and something is unclear, we're going to let you know. Thanks again!

Closing this and leaving 0002232 as related

Thank you for your feedback!