1, function: the beneficial function played by things or methods; efficacy

2. Performance: the performance and function of machines, equipment and articles.

Second, the nature is different.

1. Function: the property that an object can meet certain requirements. Any attribute that meets the needs of users belongs to the category of function. The attribute that meets the real needs of users is function, and the attribute that meets the potential needs of users is also function.

2. Performance: Physical, chemical or technical characteristics suitable for users' requirements, such as strength, chemical composition, purity, power and rotation speed.

Third, the emphasis is different.

1, function: focus on abstract things.

2. Performance: Focus on things or things that exist objectively.