In software development, a static dependency refers to a type of dependency where the implementation of one component relies on the implementation of another component and cannot change or evolve independently. This can have a negative impact on performance, as any changes or updates to the dependent component will affect the performance of the dependent component. Additionally, if the dependent component becomes slow or experiences issues, it can negatively impact the performance of the component with the static dependency. To mitigate this impact, dynamic dependencies, where the components can evolve and change independently, are often preferred.