How did a bug with idempotency get into the speed optimization task list? How did it affect your work?

Idempotency is a property of an operation where repeated execution with the same parameters does not change the result. In speed optimization tasks, sometimes attempts are made to cache or accelerate operations without considering idempotency, which can lead to bugs, for example, when a repeated function call changes the game state or data.

In my work, this manifested as follows: when optimizing the loading of game resources, I implemented request caching but did not check for idempotency of calls. As a result, repeated requests to the same resource sometimes led to duplication or conflicts in the game state. After identifying the problem, I added idempotency control — for example, unique request keys and checks for already completed operations, which eliminated the bug and improved stability.

Example:

// Example of an idempotent resource loading function
var loadedResources = make(map[string]bool)

func LoadResource(id string) error {
    if loadedResources[id] {
        return nil // resource already loaded, do nothing
    }
    // resource loading logic
    loadedResources[id] = true
    return nil
}