Run results for: Find last element of an array

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36

Browser: Chrome 119

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

pop

2.6M/s

length-1

2.2M/s

slice

2.1M/s

lodash

929K/s

View exact numbers

Test name	Executions per second
✓ pop	2,635,119 Ops/sec
length-1	2,173,232 Ops/sec
slice	2,080,971 Ops/sec
lodash	928,818 Ops/sec

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var arr1 = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
var arr2 = [];

function lodashFindLast(arr, n) {
  const element = _.findLast(arr);
  return element === n;
}

function lengthLast(arr, n) {
  const element = arr[arr.lenght - 1];
  return element === n;
}

function popLast(arr, n) {
  const element = arr.pop();
  return element === n;
}

function sliceArray(arr, n) {
  const element = arr.slice(-1);
  return element === n;
}

Tests:

lodash
lodashFindLast(arr1, 8); lodashFindLast(arr1, 9); lodashFindLast(arr2, 9);
length-1
lengthLast(arr1, 8); lengthLast(arr1, 9); lengthLast(arr2, 9);
slice
sliceArray(arr1, 8); sliceArray(arr1, 9); sliceArray(arr2, 9);
pop
popLast(arr1, 8); popLast(arr1, 9); popLast(arr2, 9);