Test case details

Preparation Code

Test cases

Test #1

var str = ''; for (var i = 0; i < 10000; i++) {     str += 'a'; }

Test #2

var res = []; for (var i = 0; i < 10000; i++) {     res.push('a'); } var str = res.join('');

Test #3

var res = new Array(10000); for (var i = 0; i < 10000; i++) {     res[i] = 'a'; } var str = res.join('');