Run results for: map vs array

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 YaBrowser/25.2.0.0 Safari/537.36

Browser: Yandex Browser 25

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

map

10.2M/s

array

24K/s

View exact numbers

Test name	Executions per second
✓ map	10,207,052 Ops/sec
array	23,861 Ops/sec

Script Preparation code:

var array = [];
for (var i=0; i<300; ++i) {
  	array.push('00' + i);
}

function hasWithIndexOf(needle) {
	return array.indexOf(needle) !== -1;
}

var map = new Set();
array.forEach(item => map.add(item));

function hasWithMap(needle) {
	return map.has(needle);
}

Tests:

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