Run results for: splice vs delete on different types random index

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36

Browser: Chrome 130

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

deleteByDelete

1.9M/s

deleteBySplice

1K/s

View exact numbers

Test name	Executions per second
✓ deleteByDelete	1,865,225 Ops/sec
deleteBySplice	1,367 Ops/sec

HTML Preparation code:

<script>
  const numArr = new Array(1e5).fill(1);
  const stringArr = new Array(1e5).fill('m1c6kzws0iubt8g0zlsug14i');
  const arrArr = new Array(1e5).fill([1,2,3]);
  const objArr = new Array(1e5).fill({a: 1});
  var array = [].concat(numArr, stringArr, objArr, arrArr);
  
  var index1 =  Math.floor(Math.random() * 1e5)
  var index2 =  Math.floor(Math.random() * 1e5)
  var index3 =  Math.floor(Math.random() * 1e5)
</script>

Script Preparation code:

function deleteBySplice (array, index) {
  
  if (index !== -1) {
  	array.splice( index, 1 );
  }
}

function deleteByDelete (array, index) {
  
  if (index !== -1) {
  	delete array[index];
  }
}

Tests:

deleteBySplice
deleteBySplice( array, index1 ); deleteBySplice( array, index2 ); deleteBySplice( array, index3 );
deleteByDelete
deleteByDelete( array, index1 ); deleteByDelete( array, index2 ); deleteByDelete( array, index3 );