Run results for: Array .push() vs .unshift() with random numbers

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.97 Safari/537.36

Browser: Chrome 83

Operating system: Mac OS X 10.15.4

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
.unshift()	2.4 Ops/sec
.push()	358.0 Ops/sec

Script Preparation code:

var arr = []

AخA
 
var arr = []

Tests:

.unshift()
for (let i = 0; i < 10000; i++) { arr.unshift(Math.random()) }
for (let i = 0; i < 10000; i++) {
arr.unshift(Math.random())
}

for (let i = 0; i < 10000; i++) {
  arr.push(Math.random())
}

 
for (let i = 0; i < 10000; i++) {  arr.push(Math.random())}