Run results for: Plus equals is slow 333

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
var Plus equals	465433.1 Ops/sec
var Plus	375831.5 Ops/sec
let plus equals	171015.7 Ops/sec
let plus	376920.4 Ops/sec

Tests:

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; }
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; }

Run results for: Plus equals is slow 333

Why the hell 333

var Plus equals

var Plus

let plus equals

let plus