Run results for: string concatenation += vs Array.prototype.join()

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.0.0 Safari/537.36

Browser: Chrome 113

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
+=	20372.0 Ops/sec
Array.prototype.join	5738.1 Ops/sec

Tests:

+=
let s = ''; for (let i = 0; i < 10000; ++i) { s += i; } const t = s;
Array.prototype.join
let s = []; for (let i = 0; i < 10000; ++i) { s.push(i); } const t = s.join('');