Most efficient way to create a zero filled JavaScript array?

Question

What is the most efficient way to create an arbitrary length zero filled array in JavaScript?

Answer 1

The already mentioned ES 6 fill method takes care of this nicely. Most modern desktop browsers already support the required Array prototype methods as of today (Chromium, FF, Edge and Safari) [1]. You can look up details on MDN. A simple usage example is

a = new Array(10).fill(0);

Given the current browser support you should be cautious to use this unless you are sure your audience uses modern Desktop browsers.