Run results for: Array pop-push vs last index element check

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser: Chrome 123

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

pop-push check

3.0M/s

last-index check

2.7M/s

View exact numbers

Test name	Executions per second
✓ pop-push check	2,979,303 Ops/sec
last-index check	2,650,433 Ops/sec

Script Preparation code:

var arr1 = [0,1,2,3,4,5,6,7,8,9];
var arr2 = [];

function pushPopLast(arr, n) {
  const element = arr.pop();
  arr.push(element);
  return element === n;
}

function indexLast(arr, n) {
  const element = arr[arr.lenght - 1];
  return element === n;
}

Tests:

pop-push check
pushPopLast(arr1, 8); pushPopLast(arr1, 9); pushPopLast(arr2, 9);
last-index check
indexLast(arr1, 8); indexLast(arr1, 9); indexLast(arr2, 9);

Run results for: Array pop-push vs last index element check

Comparing pop-push method vs last index check for an array element

pop-push check

last-index check