How can I improve the performance of map and filter functions in JavaScript?

How can I improve the performance of map and filter functions in JavaScript?

To improve performance, consider using a single loop instead of separate map and filter calls. This reduces overhead.

Can you give me an example of using a single loop?

Sure! Instead of using map and then filter, you can do both in one loop like this:

const result = [];
array.forEach(item => {
    if (condition(item)) {
        result.push(transform(item));
    }
});

What about using other methods like reduce?

Using reduce can also be efficient. You can accumulate results while filtering in one pass:

const result = array.reduce((acc, item) => {
    if (condition(item)) {
        acc.push(transform(item));
    }
    return acc;
}, []);

Are there any performance trade-offs I should be aware of?

Yes, while combining operations can improve performance, it may reduce code readability. Always balance performance with maintainability.