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I have singleton in Java and I have realized, that I could make its fields static and it would work same way as regular instance fields. Would there be a performance / optimization difference? If so, what would turned out better? Is there a preferred way to implement singleton fields? (again, I am talking fields, not methods) |
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Yes, there could be a performance difference. If you were, for example, to write a class for a Logger, and in the entire runtime of the application you never logged anything, then you wouldn't have needed to initialize the logger. If you wrote this class as In terms of the "Preferred Way," from what I've heard, it is preferred to implement it as a Singleton or similar if your object has state, and static if otherwise. This is to improve testability, because testing a In your case, with fields, the answer is definitely to go with a singleton unless you have strong reason to do otherwise. |
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