Run results for: spread vs concat vs unshift

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 YaBrowser/20.12.1.179 Yowser/2.5 Safari/537.36

Browser: Yandex Browser 20

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
arrayUnshift123	18389.8 Ops/sec
arrayConcat123	549.8 Ops/sec
arraySpread123	121.7 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