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

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

Rest parameters allow you to represent an indefinite number of arguments as an array, while spread parameters expand an array into individual elements. In terms of performance, rest parameters can be more efficient when dealing with a large number of arguments, as they avoid the overhead of creating multiple variables.

Can you give me an example of how to use both in a function?

Sure! Here's an example:

function example(...restParams) {
    console.log(restParams);
}

const arr = [1, 2, 3];
example(...arr);

In this case, ...restParams collects all arguments into an array, while ...arr spreads the array elements as individual arguments.

Are there any scenarios where one is preferred over the other?

Yes, rest parameters are preferred when you want to handle multiple arguments as an array, while spread parameters are useful when you need to pass elements of an array as separate arguments to a function.