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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.63 Safari/537.36 Edg/93.0.961.38

Browser: Chrome 93

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Remove by splice	570918.4 Ops/sec
Remove by copy within	572227.9 Ops/sec
Remove by filter	250885.2 Ops/sec
Remove by delete	1393911.0 Ops/sec

HTML Preparation code:

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</script>

Script Preparation code:

/* these functions assume that only one element matches, so they do not loop! */

function removeBySplice (array, element) {
  var index = array.indexOf( element );
  if (index !== -1) {
  	array.splice( index, 1 );
  }
}

function removeByCopyWithin (array, element) {
  var index = array.indexOf( element );
  if (index !== -1) {
  	array.copyWithin( index, index + 1 );
    --array.length;
  }
}

function removeByFilter (array, element) {
  array = array.filter( el => el !== element );
}

function removeByDelete (array, element) {
  delete array[element];
}

Tests:

Remove by splice
removeBySplice( array, "uyjxmtqnrzvj7mkyqmtoqolxr" ); removeBySplice( array, "m1c6kzws0iubt8g0zlsug14i" ); removeBySplice( array, "4wlivut0n1ht80rs5lyf7ds4i" );
Remove by copy within
removeByCopyWithin( array, "uyjxmtqnrzvj7mkyqmtoqolxr" ); removeByCopyWithin( array, "m1c6kzws0iubt8g0zlsug14i" ); removeByCopyWithin( array, "4wlivut0n1ht80rs5lyf7ds4i" );
Remove by filter
removeByFilter( array, "uyjxmtqnrzvj7mkyqmtoqolxr" ); removeByFilter( array, "m1c6kzws0iubt8g0zlsug14i" ); removeByFilter( array, "4wlivut0n1ht80rs5lyf7ds4i" );
Remove by delete
removeByDelete( array, "uyjxmtqnrzvj7mkyqmtoqolxr" ); removeByDelete( array, "m1c6kzws0iubt8g0zlsug14i" ); removeByDelete( array, "4wlivut0n1ht80rs5lyf7ds4i" );

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

Remove by splice

Remove by copy within

Remove by filter

Remove by delete