node.js - JavaScript performance difference between double equals (==) and triple equals (===)

Question

In JavaScript, is there a performance difference between using a double equals (==) vs using a triple equals (===)?

Example: if (foo == bar) vs if (foo === bar)

Answer 1

• If the types compared are the same, they are identical. That is to say they use the exact same algorithm.

• If the types are different, then performance is irrelevant. Either you need type coercion, or you don't. If you don't need it, don't use == because the result you get may be unexpected.