UKismetSystemLibrary::CollectGarbage
#include "Kismet/KismetSystemLibrary.h"
Access: public
Specifiers: staticUFUNCTIONBlueprintCallable
Description
Requests that the engine delete all unreferenced UObjects, queuing garbage collection to run at the end of the frame.
Caveats & Gotchas
- • Can cause a noticeable hitch — the header itself warns this is a slow operation and should only be triggered where a frame stall is acceptable (e.g. loading screens).
- • This queues collection for end-of-frame rather than running it immediately, so don't expect memory to be freed synchronously when this call returns.
- • Forcing GC too frequently defeats the engine's own GC scheduling heuristics and can hurt performance more than it helps — prefer letting the engine manage collection timing except during known safe windows.
Signature
static void CollectGarbage()Return Type
void Example
Force a GC pass during a loading screen C++
// Safe to hitch here since a loading screen is covering the viewport
UKismetSystemLibrary::CollectGarbage();Tags
Version History
Introduced in: 4.0
| Version | Status | Notes |
|---|---|---|
| 5.6 | stable | — |
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