Run results for: Remove by splice vs copyWithin vs filter

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.125 Safari/537.36

Browser: Chrome 84

Operating system: Linux

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Delete by Splice	524581.4 Ops/sec
Delete by copyWithin	528607.3 Ops/sec
Delete by Filter	66736.5 Ops/sec

HTML Preparation code:

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  var array = 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</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 );
}

Tests:

Delete by Splice
deleteBySplice( array, 42 ); deleteBySplice( array, 0 ); deleteBySplice( array, 68 );
Delete by copyWithin
deleteByCopyWithin( array, 42 ); deleteByCopyWithin( array, 0 ); deleteByCopyWithin( array, 68 );
Delete by Filter
deleteByFilter( array, 42 ); deleteByFilter( array, 0 ); deleteByFilter( array, 68 );

Run results for: Remove by splice vs copyWithin vs filter

Deletion of an element from an array.

Delete by Splice

Delete by copyWithin

Delete by Filter