Provide a default strategy if users enabled the performance test but no other config changed

[taoran6]

The factory mode possibly cast light on this. We would provide default implementation and user can provide the name of the strategy and that could help provide prototype for the strategy (hydrate a strategy with a predefined name).
Please refer to the following design patterns:

• Prototype
• Abstract factory
• Flyweight

Originally posted by @hydraxman in #279 (comment)