Epic Games addressed persistent stuttering problems during Unreal Fest 2025 through a presentation by Senior Software Engineer Ari Arnbjörnsson. The company identified seven main causes of performance hitches that plague PC gaming experiences. Level streaming issues arise when developers misuse static mesh actors instead of more efficient instanced alternatives. Physics calculations create problems when teams fail to optimize collision shapes and disable distant interactive elements. Actor spawning causes frame drops when complex characters with multiple components appear simultaneously.
Pipeline State Object compilation remains the most common stuttering source on PC platforms. Garbage collection hitches occur when unused object instances overwhelm system resources. Synchronous loading blocks game threads and creates extended delays. Blueprint content scripts generate performance issues through excessive timers and update cycles. Epic continues developing experimental features like Cell Transformers and Incremental Reachability Analysis to combat these problems. The company emphasizes that developers must embrace hardware limitations and implement strategic optimization techniques to achieve smooth gameplay experiences.
Pipeline State Object compilation remains the most common stuttering source on PC platforms. Garbage collection hitches occur when unused object instances overwhelm system resources. Synchronous loading blocks game threads and creates extended delays. Blueprint content scripts generate performance issues through excessive timers and update cycles. Epic continues developing experimental features like Cell Transformers and Incremental Reachability Analysis to combat these problems. The company emphasizes that developers must embrace hardware limitations and implement strategic optimization techniques to achieve smooth gameplay experiences.
