Comparing speed of getting element by id with jQuery vs Vanilla JS

Array#slice vs for loop with array preallocation

Array#slice vs for loop with array preallocation

Array#slice vs for loop with array preallocation

Compare the new ES6 spread operator with the traditional concat() method. All methods create a fresh array to simulate an environment where immutable data is a requirement.

Compare the new ES6 spread operator with the traditional concat() method. All methods create a fresh array to simulate an environment where immutable data is a requirement.

Compare the new ES6 spread operator with the traditional concat() method. All methods create a fresh array to simulate an environment where immutable data is a requirement.

Compares different approaches to set an object property