Test case details

Preparation Code

Test cases

Test #1

for (var res = '', i = 0; i < 100000; i++) {  res += 'a'; }

Test #2

for (var res = '', i = 0; i < 100000; i++) {  res.concat('a'); }

Test #3

for (var res = [], i = 0; i < 100000; i++) {  res[i] = 'a'; } res = res.join('');