Run results for: Remove by splice vs filter

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:92.0) Gecko/20100101 Firefox/92.0

Browser: Firefox 92

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
deleteBySplice	611097.2 Ops/sec
Delete by copyWithin	619478.8 Ops/sec
deleteByFilter	223034.8 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, elements) {
    elements.forEach(element => {
        var index = array.indexOf(element);
        if (index !== -1) {
            array.splice(index, 1);
        }
    })
}

function deleteByCopyWithin(array, elements) {
    elements.forEach(element => {
        var index = array.indexOf(element);
        if (index !== -1) {
            array.copyWithin(index, index + 1);
            --array.length;
        }
    })
}

function deleteByFilter(array, elements) {
    elements.forEach(element => {
        array[array.indexOf(element)] = undefined;
    })
    array = array.filter(el => !!el);
}

Tests:

deleteBySplice
deleteBySplice( array, ["uyjxmtqnrzvj7mkyqmtoqolxr","m1c6kzws0iubt8g0zlsug14i","4wlivut0n1ht80rs5lyf7ds4i"] );
Delete by copyWithin
deleteByCopyWithin( array, ["uyjxmtqnrzvj7mkyqmtoqolxr","m1c6kzws0iubt8g0zlsug14i","4wlivut0n1ht80rs5lyf7ds4i"] );
deleteByFilter
deleteByFilter( array, ["uyjxmtqnrzvj7mkyqmtoqolxr","m1c6kzws0iubt8g0zlsug14i","4wlivut0n1ht80rs5lyf7ds4i"] );

Run results for: Remove by splice vs filter

Deletion of an element from an array.

deleteBySplice

Delete by copyWithin

deleteByFilter