Run results for: indexOf vs map with indexOf

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36

Browser: Chrome 130

Operating system: Android

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Array index of	198392.7 Ops/sec
Map index of	62270.9 Ops/sec

Script Preparation code:

var array = [];
for (var i = 0; i < 300; ++i) {
    array.push({
        'id': i,
        'name': 'test-' + i
    });
}

function hasWithIndexOf(id) {
    return array.indexOf(i => i.id === id);
}

var map = array.map(i => i.id);

function hasWithMap(id) {
    return map.indexOf(id);
}

Tests:

Array index of
for (var i=0; i<100; ++i) { hasWithIndexOf('404'); }
Map index of
for (var i=0; i<100; ++i) { hasWithMap('404'); }

Run results for: indexOf vs map with indexOf

Array index of

Map index of