Benchmark: Plus equals is slow 333 - MeasureThat.net

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; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
var Plus equals
var Plus
let plus equals
let plus

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 7 years ago)

User agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36

Browser/OS: Chrome 53 on Windows 7

View result in a separate tab

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