spread vs concat vs unshift

Compare the new ES6 spread operator with the traditional concat() method

Testing remove speed

Testing different event listener function types and speed difference between native and fake (callbacks array).

Measure the performance of delete versus removing a prop from an object

Measure the performance of delete versus removing a prop from an object

Compare the new ES6 spread operator with the traditional slice() method

Compare the new ES6 spread operator with the traditional concat() method and push

This is a test description