Run results for: arr unshift vs push + reverse (large array)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 YaBrowser/23.7.5.734 Yowser/2.5 Safari/537.36

Browser: Yandex Browser 23

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
unshift	0.1 Ops/sec
push + reverse	44.6 Ops/sec

Script Preparation code:

var arr = [];

AخA
 
var arr = [];

Tests:

unshift

for (let i = 0; i < 100000; i++){
  arr.unshift(i);
}

 
for (let i = 0; i < 100000; i++){  arr.unshift(i);}

push + reverse
for (let i = 0; i < 100000; i++){ arr.push(i); } arr.reverse();
for (let i = 0; i < 100000; i++){
arr.push(i);
}
arr.reverse();