Run results for: Set vs Map vs Object for lookups (1000 entries)

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser: Chrome 133

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Map lookup

125.5M/s

Set lookup

118.2M/s

Array lookup

74.2M/s

Object lookup

68.3M/s

View exact numbers

Test name	Executions per second
✓ Map lookup	125,513,184 Ops/sec
Set lookup	118,184,440 Ops/sec
Array lookup	74,234,400 Ops/sec
Object lookup	68,292,672 Ops/sec

Script Preparation code:

var list = [
    "Lorem", "ipsum", "dolor", "sit", "amet", "consectetur", "adipisicing", "elit.", "Ullam", "nesciunt", "debitis", "facilis", "qui", "possimus", "minus", "rerum", "velit", "saepe", "magnam", "voluptatum", "quos", "eveniet", "ducimus", "facere", "harum", "itaque", "atque", "assumenda", "reiciendis", "exercitationem"
];

// Generate 970 unique random words
while (list.length < 1000) {
    let word = Math.random().toString(36).substring(2, 10); // Generate a random word
    if (!list.includes(word)) {
        list.push(word);
    }
}

var set = new Set(list);

var map = new Map();
list.forEach(word => map.set(word, true));

var object = {};
list.forEach(word => object[word] = true);

Tests:

Object lookup
var b = object["consectetur"]
Map lookup
var b = map.has("consectetur")
Set lookup
var b = set.has("consectetur")
Array lookup
var b = list.find(e => e == "consectetur")