Most efficient way to concatenate strings JavaScript in a for loop

Question

Let say you have a for loop and you want to build a string in a very specific way using template literals

I've find 2 similar ways to do it.

let text = ''
words = ['Hello', 'world']
for (i = 0; i < n; i++) {
    text += `${words[i]} || `
}

Or

let text = ''
words = ['Hello', 'world']
for (i = 0; i < n; i++) {
    text = `${text}${words[i]} || `
}

Both produce the same output (Hello || world || )

Is any difference in performance or standard?

Answer 1

I would use words.join(" || ")+" || " today is the fastest way, see this http://jsben.ch/DlXOa , as @jacob points out, it is a relative conclusion. But, as a general rule in JavaScript, usually built-in methods are faster.