Run results for: Remove by splice vs copyWithin vs filter vs set.delete

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1.1 Safari/605.1.15

Browser: Safari 14

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Delete by Splice	395494.4 Ops/sec
Delete by copyWithin	399383.8 Ops/sec
Delete by Filter	190075.3 Ops/sec
Delete by Set	1616448.1 Ops/sec

HTML Preparation code:

<script>
  var array = 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  var set = new Set(array);
</script>

Script Preparation code:

/* these functions assume that only one element matches, so they do not loop! */

function deleteBySplice (array, element) {
  var index = array.indexOf( element );
  if (index !== -1) {
  	array.splice( 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 );
}

function deleteBySet (set, element) {
  set.delete(element)
}

Tests:

Delete by Splice
deleteBySplice( array, "uyjxmtqnrzvj7mkyqmtoqolxr" ); deleteBySplice( array, "m1c6kzws0iubt8g0zlsug14i" ); deleteBySplice( 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 Set
deleteBySet( set, "uyjxmtqnrzvj7mkyqmtoqolxr" ); deleteBySet( set, "m1c6kzws0iubt8g0zlsug14i" ); deleteBySet( set, "4wlivut0n1ht80rs5lyf7ds4i" );

Run results for: Remove by splice vs copyWithin vs filter vs set.delete

Deletion of an element from an array.

Delete by Splice

Delete by copyWithin

Delete by Filter

Delete by Set