What are the performance differences between spread and rest operators in JavaScript?

What are the performance differences between spread and rest operators in JavaScript?

The spread operator (...) is used to expand elements of an iterable, while the rest operator (...) collects multiple elements into an array. Performance can vary based on context.

Can you give me an example of each operator?

Sure! For the spread operator: const arr = [1, 2, 3]; const newArr = [...arr, 4, 5]; For the rest operator: function sum(...numbers) { return numbers.reduce((acc, num) => acc + num, 0); }

Which one is generally faster?

It depends on the use case. The spread operator can be faster for copying arrays, while the rest operator is efficient for handling variable arguments in functions.

Are there any limitations to using these operators?

Yes, the spread operator can only be used in certain contexts, like array literals or function calls, while the rest operator can only be used in function parameters.