Array .push() vs .unshift() + ref to last

4 years ago
User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.87 Safari/537.36
Test name Executions per second
.unshift() 25940.2 Ops/sec
.push() 412210.2 Ops/sec
Script Preparation code:
AخA
 
var arr = [], last = 0
Tests:
  • .unshift()

     
    arr.unshift(42); last = arr[0]
  • .push()

     
    arr.push(42); last = arr[arr.length - 1]
Open this result on MeasureThat.net