Run results for: spread vs concat vs unshift

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 YaBrowser/18.9.0.3363 Yowser/2.5 Safari/537.36

Browser: Yandex Browser 18

Operating system: Mac OS X 10.13.5

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
arrayUnshift123	23217.5 Ops/sec
arrayConcat123	54.9 Ops/sec
arraySpread123	8.4 Ops/sec

Script Preparation code:

var array = [1,2,3];

Tests:

arrayUnshift123
array.unshift(0);
arrayConcat123
array = array.concat([0])
arraySpread123
array = [0, ...array]

Run results for: spread vs concat vs unshift

spread vs concat vs unshift

arrayUnshift123

arrayConcat123

arraySpread123