Run results for: Versions of Quick Sort vs. .sort

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
quickSort	1751413.0 Ops/sec
quickSort2	153752640.0 Ops/sec
built in sort	130836872.0 Ops/sec

Script Preparation code:

var array = [0, 213, 2, 55312, 322, 1312, 12311123, 54642 ];
function quickSort(arr){
  if(arr.length <= 1) return arr
  const pivot = arr[arr.length - 1]
  let left = []
  let right = []
  for(let i = 0; i < arr.length-1; i++){
    if (arr[i] < pivot) {
      left.push(arr[i])
    } else {
      right.push(arr[i])
    }
  }
  return [].concat(quickSort(left),pivot,quickSort(right))
}
function quickSort2(arr){
  if(arr.length <= 1) return arr
  const pivot = arr.pop()
  let left = []
  let right = []
  while(arr[0]){
    if (arr[0] < pivot) {
      left.push(arr.shift())
    } else {
      right.push(arr.shift())
    }
  }
  return [].concat(quickSort(left),pivot,quickSort(right))
}

Tests:

quickSort
quickSort(array);
quickSort2
quickSort2(array);
built in sort
array.sort(function (a, b) { return a - b });

Run results for: Versions of Quick Sort vs. .sort

quickSort

quickSort2

built in sort