Run results for: Plus equals is slow 222

Run details:

User agent: Mozilla/5.0 (Linux; Android 6.0.1; E6553 Build/32.2.A.0.253) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.98 Mobile Safari/537.36

Browser: Chrome Mobile 52

Operating system: Android 6.0.1

Device Platform: E6553

Date tested: 7 years ago

Test name	Executions per second
Plus equals	170950.9 Ops/sec
Plus	375328.5 Ops/sec
Var plus equals	468591.6 Ops/sec
var plus	374921.3 Ops/sec

Tests:

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

Run results for: Plus equals is slow 222

Why the hell 222

Plus equals

Plus

Var plus equals

var plus