Run results for: Hashmap vs Dictionary object vs lodash uniqWith

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.77 Safari/537.36

Browser: Chrome 91

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

HTML Preparation code:

<script src='https://cdn.jsdelivr.net/npm/lodash@4.17.10/lodash.min.js'></script>

Script Preparation code:

var valueList2 = ["apa", "anya", "gyerek"];
for (var i = 0; i < 14200; i++) {
  valueList2.push("Apa" + i);
}

Tests:

Hashmap
var res2 = new Map(); for (var value of valueList2) { if (!res2.get(value.toLowerCase())) { res2.set(value.toLocaleLowerCase(), value.toLocaleLowerCase()); } }
Dictionary object
var dictionary = {}; for (var i = 0; i < valueList2.length; i++) { var item = valueList2[i].toLowerCase(); if (!dictionary[item]) { dictionary[item] = i; } }
_uniqWith
_.uniqWith(valueList2, (arrVal, othVal) => arrVal.toLowerCase() === othVal.toLowerCase());