Run results for: Array.findFirst vs Map.has

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36

Browser: Chrome 119

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
findFirst	0.0 Ops/sec
map	410112.3 Ops/sec

Script Preparation code:

let array = [];
for (var i=0; i<300; ++i) {
  	array.push('00' + i);
}

function hasWithFindFirst(needle) {
	return array.findFirst(needle) !== undefined;
}

let map = {};
array.forEach(item => map[item] = true);

function hasWithMap(needle) {
	return needle in map;
}

Tests:

findFirst
for (var i=0; i<100; ++i) { hasWithFindFirst('404'); }
map
for (var i=0; i<100; ++i) { hasWithMap('404'); }

Run results for: Array.findFirst vs Map.has

Compare performance between Array.findFirst vs Map.has

findFirst

map