Run results for: concat vs unshift

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 YaBrowser/19.6.0.1583 Yowser/2.5 Safari/537.36

Browser: Yandex Browser 19

Operating system: Mac OS X 10.12.6

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
arrayUnshift123	25325.2 Ops/sec
arrayConcat123	410.6 Ops/sec

Script Preparation code:

var array = [1,2,3];

Tests:

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

Run results for: concat vs unshift

spread vs concat vs unshift

arrayUnshift123

arrayConcat123