Run results for: Remove by slice vs copyWithin vs filter

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:88.0) Gecko/20100101 Firefox/88.0

Browser: Firefox 88

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Delete by Slice	66699.2 Ops/sec
Delete by copyWithin	612552.3 Ops/sec
Delete by Filter	167421.1 Ops/sec
Delete by sliceConcat	613343.2 Ops/sec

HTML Preparation code:

<script>
  var array = 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</script>

Script Preparation code:

/* these functions assume that only one element matches, so they do not loop! */

function deleteBySlice (array, element) {
  var index = array.indexOf( element );
  if (index !== -1) {
  	array = [...array.slice(0, index), ...array.slice(index + 1)];
  }
}

function deleteBySliceConcat (array, element) {
  var index = array.indexOf( element );
  if (index !== -1) {
  	array = array.slice(0, index).concat(array.slice(index + 1));
  }
}

function deleteByCopyWithin (array, element) {
  var index = array.indexOf( element );
  if (index !== -1) {
  	array.copyWithin( index, index + 1 );
    array.length--;
  }
}

function deleteByFilter (array, element) {
  array = array.filter( el => el !== element );
}

Tests:

Delete by Slice
deleteBySlice( array, "uyjxmtqnrzvj7mkyqmtoqolxr" ); deleteBySlice( array, "m1c6kzws0iubt8g0zlsug14i" ); deleteBySlice( array, "4wlivut0n1ht80rs5lyf7ds4i" );
Delete by copyWithin
deleteByCopyWithin( array, "uyjxmtqnrzvj7mkyqmtoqolxr" ); deleteByCopyWithin( array, "m1c6kzws0iubt8g0zlsug14i" ); deleteByCopyWithin( array, "4wlivut0n1ht80rs5lyf7ds4i" );
Delete by Filter
deleteByFilter( array, "uyjxmtqnrzvj7mkyqmtoqolxr" ); deleteByFilter( array, "m1c6kzws0iubt8g0zlsug14i" ); deleteByFilter( array, "4wlivut0n1ht80rs5lyf7ds4i" );
Delete by sliceConcat
deleteBySliceConcat( array, "uyjxmtqnrzvj7mkyqmtoqolxr" ); deleteBySliceConcat( array, "m1c6kzws0iubt8g0zlsug14i" ); deleteBySliceConcat( array, "4wlivut0n1ht80rs5lyf7ds4i" );

Run results for: Remove by slice vs copyWithin vs filter

Deletion of an element from an array.

Delete by Slice

Delete by copyWithin

Delete by Filter

Delete by sliceConcat