Unreal Engine Blueprints Blueprint Debugging and Optimization 3

Question 1

What is the recommended way to avoid performance problems when using 'Get All Actors of Class' in Blueprints?

Accepted Answer

Cache the result in a variable at Begin Play and reuse it, rather than calling it every Tick

Answer

Only use it inside the Construction Script

Answer

Replace it with a custom Find Actor utility node

Answer

Limit it to 10 calls per second with a throttle gate

Question 2

Which Blueprint asset type consolidates reusable static utility functions callable from any Blueprint in the project?

Accepted Answer

Blueprint Function Library

Answer

Event Dispatcher

Answer

Blueprint Interface

Answer

Construction Script

Question 3

What does marking a Blueprint variable as 'Expose on Spawn' enable?

Accepted Answer

The variable can be set as a pin directly on the Spawn Actor from Class node

Answer

The variable becomes visible in the level viewport outliner

Answer

The variable is automatically replicated to all clients

Answer

The variable is only accessible from the Construction Script

Question 4

Why do instanced static mesh components combined with a single manager Blueprint improve performance for many similar objects like collectibles?

Accepted Answer

Instanced meshes batch draw calls and a single manager eliminates per-actor tick overhead

Answer

Each instance gets its own dedicated LOD system automatically

Answer

Instancing disables collision to reduce physics cost

Answer

The manager Blueprint runs on the GPU instead of the CPU

Question 5

What does the 'Replication' setting on a Blueprint variable control?

Accepted Answer

Whether and how the variable is synchronized from server to clients over the network

Answer

Whether the variable is duplicated in memory for thread safety

Answer

Whether the variable is included in the save game system

Answer

Whether the variable is visible in the Blueprint Debugger panel

Question 6

What is the performance benefit of using 'Soft References' (TSoftObjectPtr / Asset ID) instead of hard references in Blueprints?

Accepted Answer

Soft references do not force the referenced asset to load into memory until explicitly loaded, reducing initial memory footprint

Answer

Soft references always load faster than hard references at runtime

Answer

Soft references bypass the garbage collector entirely

Answer

Soft references automatically stream assets on a background thread without any code