Faster implementation?

[jschatz1]

Would it be faster to do something like:

  redashUuid4(uuid) {
    let final = "";
    for(var i = 0; i < uuid.length; i++){
      if(i == 12 || i == 16 || i == 20){
        final = final.concat('-')
      }
      final = final.concat(uuid.charAt(i))
    }
    return final;
  },

[jschatz1]

Either way it probably wouldn't make a huge difference. 😄