Arc function is a common technology in programming, which can improve the efficiency of code execution and reduce the workload of developers. The full name of Arc is "automatic reference counting", which is a very useful memory management technology and widely used in the development of platforms such as iOS and macOS. Using Arc function can avoid memory leakage, wild pointer and other problems, and improve the security and reliability of the code.

The advantage of Arc function is that it can automatically manage the reference count of objects, so that developers can focus on the logical realization of the code without thinking too much about memory management, which greatly improves the development efficiency. In addition, the Arc function does not need to manually release the object, which reduces the hidden dangers caused by manually releasing the object and can avoid some common programming errors.

Although the Arc function has many advantages, it also has some disadvantages. For example, due to the automatic management of object reference count, sometimes there is a problem of circular reference, which requires developers to manually break the reference chain. In addition, for the memory management of a large number of objects, the efficiency of Arc function has also decreased. But in general, Arc function is of great significance to improve the readability and maintainability of the code, and it is one of the necessary skills of modern programming.