Memory Leak Problems?

Hi. I'm just started learning about 2 weeks now. I pretty much already grasped basic usage and c# programming in unity.
But when I looking around the internet, there's 1 problem that usually happens in indie games which is "memory leak".
Is memory leak possible in unity and do you guys have any pointer where I should be careful to prevent this?

thank you in advance.

 

Yes, memory leaks are possible in any software.
In the case of Unity (or rather, C#), events can potentially cause memory leaks.

Whenever subscribing to an event (using

+=

), always be sure to unsubscribe from it at some point (using

-=

), otherwise it will remain in memory even if you destroy the object containing the subscription.

Unity has a custom UnityEvent class that works the same way and should be treated the same way.

See these other resources for more info:
https://forum.unity.com/threads/can...-and-resources-load-cause-memory-leak.626080/
https://michaelscodingspot.com/5-te...ory-leaks-by-events-in-c-net-you-should-know/

 

Thank you very much!

 

There's things you can do on the Unity side, like keep creating new materials you forget to destroy to create a memory leak. Say you instantiate a prefab, create a new material for it, then destroy the object without destroying the material. Then you do that thousands of times. You might get yourself into some trouble.

But C# itself is on the forgiving side, seeing that it is a managed language using a garbage collector. So other than a few exceptions, memory leaks aren't something you need to worry about as much compared to some other languages. The Profiler can help you both detect them if/when they occur, and track them down.