Run results for: string concat + join vs unshift + join (2)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser: Chrome 123

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

string concat + join

10.5M/s

unshift + join

5.7M/s

View exact numbers

Test name	Executions per second
✓ string concat + join	10,527,602 Ops/sec
unshift + join	5,708,046 Ops/sec

Script Preparation code:

function case1() {
  var el = 'test';
  var arr = ['foo', 'bar'];

  return el + arr.join(',');
}

function case2() {
  var el = 'test';
  var arr = ['foo', 'bar'];

  arr.unshift(el);
  return arr.join(',');
}

Tests:

string concat + join
case1()
unshift + join
case2()