Ticking

Editor

To enable ticking in editor
For actors: Override ShouldTickIfViewportsOnly and return true.

Performance wise

• Use dumpticks will give you all enabled and disabled tick info for level
• See the tick section in Myth-busting “Best Practices” in Unreal Engine
• Aggregating Ticks to Manage Scale in Sea of Thieves | Unreal Fest Europe 2019 | Unreal Engine

Custom ticking

You can use FTSTicker to have a a function called over a period of time Example:

TickDelegate = FTickerDelegate::CreateUObject(this, &UAssetEditorSubsystem::HandleTicker);  
FTSTicker::GetCoreTicker().AddTicker(TickDelegate, 1.f);

the bool of FTickerDelegate is used to determine if we stop ticking or not