Run results for: Array concat vs spread

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36

Browser: Chrome 67

Operating system: Mac OS X 10.13.5

Device Platform: Desktop

Date tested: 6 years ago

Test name	Executions per second
Spread	427946.9 Ops/sec
Concat	1179038.1 Ops/sec

Script Preparation code:

var arr1 = (new Array(100)).fill(0).map((x, i) => i)
var arr2 = (new Array(100)).fill(0).map((x, i) => (i + 1) * 2)

AخA
 
var arr1 = (new Array(100)).fill(0).map((x, i) => i)var arr2 = (new Array(100)).fill(0).map((x, i) => (i + 1) * 2)

Tests: