Packed arrays plus a dictionary by id still cover most of a C# game loop. I only add a quadtree once collision queries get expensive. High-churn stuff (bullets, particles) belongs in a pool, not a linked list.
Same lesson showed up outside games last month while looking at a small charter desk — Phuket yacht — walking every object when you already have the id is wasted work.
arrays/lists and hash maps cover most of what i need day to day, but the big win in my experience is combining a compact list for iteration with a spatial index (quadtree/octree) for queries and collisions. for high-churn stuff (particles, bullets), object pools plus a free-list beats linked lists in c# most of the time. i once got sidetracked reading a game-themed site https://maradonarun.com/ and it reminded me how quickly a naive “iterate everything” loop falls over when counts spike. also ran into stray links on forums such as https://icefishing1xbet.org/ and https://sweetbonanzashow.org/ and it’s a good reminder to keep your entity ids and resource lookups tight so you’re not doing string work every frame. overall, trees + dictionaries + pooled arrays give a pretty solid baseline.
Great question! Here are some common data structures used for managing game objects:
Arrays/Lists: Simple and efficient for storing game objects when the number is fixed or known in advance. Great for iteration.
Linked Lists: Useful when you need dynamic resizing and frequent insertions/removals of game objects.
Trees: Often used for hierarchical organization, such as scene graphs or for spatial partitioning (e.g., quordle, quad-trees for 2D games or octrees for 3D).
Hash Tables: Excellent for quick lookups, especially when you need to access game objects by unique identifiers (like IDs).
Sets: Useful for managing collections of unique game objects, ensuring no duplicates.
Graphs: Ideal for representing complex relationships between game objects, such as in AI pathfinding or networked games.
Each structure has its pros and cons, so the choice often depends on the specific needs of the game and the types of operations you'll be performing frequently. Happy coding!
Some common data structures used for managing game objects include:
Arrays / Lists – Often used to store collections of game objects like enemies, bullets, or items. They are simple and allow fast iteration during the game loop.
Dictionaries / Hash Maps – Useful when you need quick lookup by ID or name, such as accessing specific entities or resources.
Trees (e.g., Scene Graphs, Quadtrees, Octrees) – Help organize objects spatially, which improves performance for rendering, collision detection, and visibility checks.
Linked Lists – Sometimes used for dynamic objects that are frequently added or removed, such as particles or temporary entities.
Queues / Stacks – Used for managing events, AI actions, or game state changes.
In many game engines, these structures are combined to efficiently update, render, and manage large numbers of objects in real time.
