Quick answer: Unreal Blueprint Find Array Element by Predicate too slow on large arrays? O(n) linear scan; use a dictionary or pre-sort.
Inventory of 1000 items; find by name takes 4ms.
Use TMap by key
TMap<FName, FItem>. Find is O(1). Set up at population time; lookup is cheap.
Or sort and binary search
Sort by name; binary search. O(log n). Requires maintained sort.
Audit data structures
Each array's access pattern. Linear searches in hot paths = candidates for migration.
“Array search is linear. Frequent searches need different structures.”
For inventory or lookup-heavy data, TMap is the right primitive. Arrays are for ordered collections.