Run details:
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36
Chrome 53
Windows 7
Other
8 years ago
Test name Executions per second
var Plus equals 533116.9 Ops/sec
var Plus 474404.2 Ops/sec
let plus equals 90617.3 Ops/sec
let plus 377956.5 Ops/sec
Tests:
  • var Plus equals

    AخA
     
    var x = 0;
    for (var i=0; i < 1000; i++)
    {
      x += 2 + i;
    }
  • var Plus

     
    var x = 0;
    for (var i=0; i < 1000; i++)
    {
      x = x + 2 + i;
    }
  • let plus equals

     
    let x = 0;
    for (var i=0; i < 1000; i++)
    {
      x += 2 + i;
    }
  • let plus

     
    let x = 0;
    for (var i=0; i < 1000; i++)
    {
      x = x + 2 + i;
    }