Garbage collection Wiki
Unreal's game-level memory management system uses reflection to implement garbage collection. Working effectively in Unreal requires some understanding of how these two systems interact.
Read this for a great introduction to Unreal's reflection system and using it:
Reflection allows the engine to determine if objects are still referenced by other objects, making garbage collection a viable strategy for managing memory.
One of the most important tasks within a game engine is managing memory. Unreal’s approach to solve this problem is the usage of garbage collection. In this approach, the engine will automatically delete objects when they are no longer needed. An object is no longer needed when it is no longer referenced by any other object. More general information on garbage collection can be found here:
Unreal uses the reflection system to drive garbage collection. Because the engine knows about your objects and properties, it can recognize when an object is no longer needed and automatically delete it.
While this automatic memory management does significantly reduce the mental workload to working in the engine, it is important to understand at a high level how it works, as it can only work well when you follow the “rules.” IMPORTANT: There are always exceptions to the rules, but be sure to know what you are doing if you break the rules!
Every member of a class should be declared as a UPROPERTY
If an member is left “naked, ” unreal will not know about it. So, an object you are pointing at could get deleted out from under you! It is safe to leave value types such as an int or a bool “naked” although they could not be saved, replicated, or appear in the editor.
Member pointers should only point at UObject or UObject-derived objects
The garbage collector is only smart enough to recognize relationships to an object, so the object could get deleted out from under your pointer.
Any non-UObject pointer must be pointing to something “global” in the engine, or something within its own UObject
The garbage collector could delete the object that owns what you are pointing at.
The only container that is safe to have UObject or UObject-derived pointers in is a TArray
NOTE: UObject-derived pointers/objects would be any object, component, or actor.
Remember, the garbage collector relies on reflection data!
Structs are intended to be used as “value” types. They are best used for small bits of data that are to be reused within objects and actors. For example, FVector, FRotator, FQuat. They are not garbage collected, so they must always exist within a UObject.How to learn chinese? How to get an ein number what does dp stand for what does jfc stand for How to train a mouse to do tricks Where can i buy bacon wrapped steak tips what are the best mattresses what does pcr mean what college does elle go to Tips on how to quit smoking without gaining weight what does intermittent leave mean what does it mean when a home is under contract what does it mean when you dream about being chased what does a rose mean russia invades ukraine what does that mean for the us what days does euphoria come out what does woke mean slang what does it mean when a guy loses his hard on How to make ramen better what does low cholesterol mean How to pot a plant How to starve bad gut bacteria? what are stakeholders How to do cool poker tricks How to say hi How to grow rice? what does unresponsive mean How to do cup stacking tricks what does breast cancer feel like what is law enforcement blue alert mean How much dry food to feed a cat? what does firm mean what are the names of god Tricks on how to gain weight fast for females what does your discharge look like when pregnant How to hang mirror on wall How to change homepage on chrome How to use a diffuser? what does a map sensor do How to verify cash app card for apple pay How to stop puking? What happened to clark on new tricks How to cook beef tips and rice in a crock pot Tricks on how to pull a sagging face up How cold does it have to be to cancel school? What is allocated tips on a w2 How to read tire numbers? what time does dillard's open what time does the mail come in my area Why are the tips of my nails transparent what time does u haul open what does torque mean How to get your voice back? How long to cook a pot roast How to get fluffy hair? How to draw hand what does being in love mean what are gender stereotypes How to make money fast what does length mean How to get over someone you love How to skating tricks Why does my exhaust tips have holes How to lose upper body fat How to enter paycheck tips in quickbooks desktop when use outside payroll Tips for eating well when eating out How to open apk file? what does companionship mean How to mod gta 5? what does creeping charlie look like How to wake up tricks hacks How much to mail a letter what does brunette mean what does red discharge mean Where to buy new heel tips How to draw hand? How to watercolor what does dos mean How to cancel ps plus How many gordie howe hat tricks did gordie howe have ? What summer pest control tips for brandon floru=ida what does bbfl mean what does a confidence interval mean Tricks to memorize where the states are what does good riddance mean what does carats mean in diamonds what does placate mean Skateboarding how to start tricks what does mean in excel what does proponent mean How to clear stuffy nose instantly? Tricks tips how to make wrap dress higher cut to revealing pins How to make a lectern in minecraft? How to make a funnel cake? what does a toner do How to measure on google maps How to pull apart pulled pork tricks what does black toenail mean what does sarai mean Why do your eyes play tricks on you How to draw "tips an tricks" what time does chamber come out