Run results for: object map vs switch 「！！！！」

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

object map

4.9M/s

switch

4.7M/s

View exact numbers

Test name	Executions per second
✓ object map	4,861,557 Ops/sec
switch	4,732,794 Ops/sec

Script Preparation code:

var arr = [1, 2, 3, 4, 5]
var obj = {
    [1]: 'a',
    [2]: 'b',
    [3]: 'c',
    [4]: 'd',
    [5]: 'e'
}
var test = (val) => {
    switch (val) {
        case 1:
            return 'a';
        case 2:
            return 'b';
        case 3:
            return 'c';
        case 4:
            return 'd';
        case 5:
            return 'e';
        default:
            return '';
    }
}

Tests:

object map
const val = arr.at(Math.floor(Math.random() * 5)) const rt = obj[val]
switch
const val = arr.at(Math.floor(Math.random() * 5)) test(val)