Is there a performance difference between 'let' and 'var' in JavaScript

Question

The difference between these two keywords in terms of scoping has already been thoroughly discussed here, but I was wondering if there is any kind of performance difference

Answer 1

var: Declare a variable, value initialization optional. Let is faster in outside scope.

let: Declare a local variable with block scope. Let is a little bit slow in inside loop.

Ex:

var a;
a = 1;
a = 2; //re-intilize possibe
var a = 3; //re-declare
console.log(a); //3

let b;
b = 5;
b = 6; //re-intilize possibe
// let b = 7; //re-declare not possible
console.log(b);