What is closure performance in programming?

What is closure performance in programming?

Closure performance refers to how efficiently closures (functions that capture their surrounding state) execute in a programming language.

Why are closures important for performance?

Closures allow for better memory management and can lead to more optimized code by reducing the need for global variables.

Can you give an example of a closure in JavaScript?

Sure! Here's a simple example:

function makeCounter() {
    let count = 0;
    return function() {
        count++;
        return count;
    };
}
const counter = makeCounter();
console.log(counter()); // 1
console.log(counter()); // 2

This closure captures the count variable.

How do closures affect memory usage?

Closures can increase memory usage because they keep references to their outer scope, preventing garbage collection of those variables.