title: Is there a performance difference between 'let' and 'var' in JavaScript
body: <p>The difference between these two keywords in terms of scoping has already been thoroughly discussed <a href="https://stackoverflow.com/questions/762011/javascript-let-keyword-vs-var-keyword">here</a>, but I was wondering if there is any kind of performance difference between the two, and if so, is it negligible, or at what point would it become significant?</p>