How do Python's built-in functions perform compared to custom functions?

How do Python's built-in functions perform compared to custom functions?

Python's built-in functions are generally optimized for performance. They are implemented in C and can be faster than custom functions written in Python.

Can you give me an example of a built-in function that is faster than a custom implementation?

Sure! The sum() function is a great example. It can sum a list of numbers faster than a custom loop that adds each number.

What factors affect the performance of these functions?

Factors include the size of the data, the complexity of the operation, and how well the function is optimized in Python's implementation.

Are there any scenarios where custom functions might be better?

Yes, if you need specific functionality or optimizations that built-in functions don't provide, a custom function can be tailored to your needs.