function makeid() {
    var text = "";
    var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
  
    for (var i = 0; i < 5; i++)
      text += possible.charAt(Math.floor(Math.random() * possible.length));
  
    return text;
  }
  
  
  var data = [];
  
  for (var i = 0; i < 10000; i++) {
    data.push(makeid());
  }

Teardown JS

Test cases

Test #1

Title *

Async

Code *

for (var res = '', i = 0; i < data.length; i++) {
  res = `${res}${data[i]}`;
}

Test #2

Title *

Async

Code *

for (var res = '', i = 0; i < data.length; i++) {
  res.concat(data[i]);
}

Test case details

Preparation Code

Test cases

Test #1

Test #2