Array vs Object Performance in JavaScript

What are the performance differences between arrays and objects in JavaScript?

Arrays are optimized for numerical indexing and have faster access times for sequential data, while objects are better for key-value pairs.

Can you give me an example where one is better than the other?

Sure! If you're storing a list of items, use an array for faster iteration. For a configuration object with named properties, use an object.

How does the size of the data affect performance?

As data size increases, arrays can become slower for certain operations like insertion and deletion, while objects may handle lookups more efficiently.

Are there any best practices for choosing between them?

Yes! Use arrays for ordered collections and objects for unordered data with unique keys. Always consider the specific use case.