5 Techniques to Iterate Over JavaScript Object Entries and their Performance

This post includes 5 different ways for iterating over JavaScript Object entries and a performance comparison of those techniques.

Technique 1 : Object.entries

Object.entries() returns a list of key, value pairs. This list includes only enumerable properties and doesn’t include properties from prototype chain.

Enumerable Properties?

Properties created via simple assignment or via a property initializer

Technique 2 : Object.keys

Object.keys() returns an array of object keys. However, this function returns only enumerable properties.

Technique 3 : Object.values